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Quiz von Jessa Garcia, aktualisiert more than 1 year ago
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Erstellt von Jessa Garcia
vor mehr als 6 Jahre
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Frage 1
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Which is true?
Antworten
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Bees die if they sting
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Bats can pick up radio signal
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Penguins can fly
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Owls can move theor eyes in their heads
Frage 2
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Animals live on land but return to the water to breed.
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Mammals
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Amphibians
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Reptiles
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Crustaceans
Frage 3
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The sun is mostly made up of which gas?
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Hydrogen
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Oxygen
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Nitrogen
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Helium
Frage 4
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On the following metric units which is the smallest
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Millimeter
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Centimeter
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Nanometer
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Micron
Frage 5
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On the following elements which is the most common in the earth's crust?
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Aluminum
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Silicon
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Iron
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Calcium
Frage 6
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Coral are animals that live in
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Deep sea vents
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Warm waters
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Cold polar waters
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All of the above
Frage 7
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A rise in atmoshpheric temperature due to an increase in carbon dioxide, methane and other gases that trap heat in the atmoshpere is called____.
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Coriolis Effect
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Carbon cycle
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Green house effect
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El niño phenomenon
Frage 8
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Suppose that a river has a channel cross section of 25 square meters and a flow speed of 6 meters per second. What is its discharge rate?
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6 m^3/ s
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25 m^3/ s
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150 m^3/ s
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300 m^3/ s
Frage 9
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Which of the following determines the development of soil in a particular place?
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Climate
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Presence of plant and animal life
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The type of rock
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All are factors of soil development
Frage 10
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The [blank_start]ozone layer[blank_end] is the region of the atmoshpere which absorbs harmful UV radiation.
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ozone layer
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Ionosphere
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Heteroshpere
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Thermosphere
Frage 11
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Troposphere is warmest near the Earth's surface because
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Lightning strikes the surface which in turn heats the layer above.
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The Earth's surface reradiates solar energy which heats the lower troposhere.
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Radioactive elements in the Earth's crust heat atmosphere abovr the ground.
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The air is most compressed there by the weight of the atmosphere.
Frage 12
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Fog is a cloud with its base at or very near the ground. The formation of fog generally occurs after the ground has lost heat by
Antworten
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Convection
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Transpiration
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Radiation
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Evaporation
Frage 13
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Evaporation is the process by which a liquid changes into gas. In this process, liquid water molecules become
Antworten
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Tiny drops of water
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Molecules of water vapor
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Separate atoms of water
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Atoms of the hydrogen and oxygen
Frage 14
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Thunderstorm is produce by a cumulonimbus cloud and is always accompanied by lightning and thunder. If you hear a clap of thunder a minute after seeing a flash of lightning, the distance between you and the lightning is about
Antworten
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5km
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10km
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20km
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45km
Frage 15
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Plant cells contain most of the same organelles and structures found in animal cells. The only difference is that plant cells have
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Vacuoles
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Plasma membrane
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Mitochondria
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A cell wall
Frage 16
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An example of compound is
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Mercury
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Salt
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Carbon
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Oxygen
Frage 17
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When matter is changed into another matter having different properties, the type of change is known as
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Physical change
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Electrical change
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Chemical change
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Atomic change
Frage 18
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Baking soda produces carbon dioxide when mixed with
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Sour milk
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Flour
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Water
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Egg
Frage 19
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The bubbling of softdrinks is due to
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Air dissolved in the liquid
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Carbon dioxide dissolved in liquid
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Alcohol in the liquid
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Sugar in the liquid
Frage 20
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A gas which bacteria extract from air and change into a form which plant can use is [blank_start]nitrogen[blank_end].
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nitrogen
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oxygen
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argon
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CO2
Frage 21
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Pressure is the pull or push exerted by a weight on a given unit of area. Since air has weight, it exerts pressure on all objects exposed to it.
Decreasing air pressure, air can be made to move from a [blank_start]high[blank_end] pressure region to a [blank_start]low[blank_end] pressure region.
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high
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low
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low
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another high
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same
Frage 22
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Clouds are made up of
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water vapor
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dust particles only
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tiny droplets of water
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partially evaporated water
Frage 23
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winds are caused by
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ocean currents
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the motions of the earth
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the waving of tree branches
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the unequal heating of the earth's surface
Frage 24
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The movement of the wind is always from
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north to south
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east to west
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low pressure region to high pressure region
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high pressure region to low pressure region
Frage 25
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Density of a substance is its mass per unit volume.
A piece of brass has a mass of 16.0 g and a volume of 1.9 cm³, Find its density.
Antworten
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4.2 g/cm ³
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8.4 g/cm ³
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0.11875 cm ³
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12.6 g/cm ³
Frage 26
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Heat is the total kinetic energy of all the molecules of an object and its measured in Calories or
Antworten
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Newton
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Joules
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Centigrade
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Kelvin
Frage 27
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The measure of the average kinetic energy of molecules is known as
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kinetic energy
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expansion
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heat of evaporation
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temperature
Frage 28
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Which is true about light?
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Light has the property of waves only.
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Light is produced by excited atoms.
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Light striking your eyes will not allow you to see.
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Light energy cannot be measured.
Frage 29
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The color of all objects depends on the light reflected from that color. Color is related to the frequency and ________.
Antworten
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Doppler Effect
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Diffraction grating
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wavelength of light waves
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primary colors
Frage 30
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All electric currents are streams of moving electrons. The path followed by an electric current is called _____.
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volt
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conductors
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potential difference
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circuit
Frage 31
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A series of circuit is a single pathway for all electrons in a circuit.
A parallel circuit has two or more branches for electrons.
If all Christmas lights go out when one bulb is burned out, the lights are connected in _______.
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parallel circuit
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series circuit
Frage 32
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Acceleration is the rate of change of velocity per unit time.
A car accelerates uniformly from 15 kph to 45 kph in 10 seconds. The acceleration is [blank_start]3 km/hr-sec[blank_end] .
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3 kph/second
Frage 33
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The distance covered by an object that starts from rest and accelerates uniformly depends upon the square of the time elapsed. d = Vi + (1/2) gt²
An object starts from rest and falls freely under the force of gravity for 5 seconds. What distance has it fallen during this time?
Antworten
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49 m
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24.5 m
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122.5 m
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1225 m
Frage 34
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The acceleration of a body is directly proportional to the net force acting on the body and is inversely proportional to its mass.
What force would your arm have to exert to a bowling ball with a mass of 5 kg down an alley with an acceleration of 10 m/sec²?
Antworten
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5 N
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5 kg
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50 N
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50 kg
Frage 35
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The product of the mass and the velocity of a body is called its momentum (momentum = mv).
A gun having a mass of 5 kg fires a 20 g bullet at a speed of 500 m/sec. Find the recoil velocity of the gun.
Antworten
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2 m/sec
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20 m/sec
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0.20 m/sec
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200 m/sec
Frage 36
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Work in a physical science is equal to the force times the displacement in the direction of the force.
(W = Force x displacement)
A crate is pushed 5 meters on a level floor. The frictional force is determined as 300 N. Calculate the work performed.
Antworten
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60 N-m
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15 N-m
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150 N-m
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1500 N-m
Frage 37
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Potential energy or energy of position is the product if the weight if an object and the height to which the object is elevated.
A machine weighing 5000 N is raised onto the roof of a building 50 m high, The increase in potential energy is [blank_start]2.5 x 10^5 Joules[blank_end].
Antworten
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2.5 x 10^5 Joules
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2.5 x 10^5 Newton
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2.5 x 10^4 Joules
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2.5 x 10^4 Newton
Frage 38
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A rocket with a mass of 1000 kg is fired vertically upward with an initial velocity of 100 m/sec. Calculate its potential energy when it reaches the maximum height.
Antworten
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5 x 10 ^ 5 Joules
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5 x 10 ^ 5 N-m
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5 x 10 ^ 6 Joules
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5 x 10 ^ 6 N-m
Frage 39
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A substance that gives up hydrogen ions to water to form hydronium ions is called _____.
Antworten
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water
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strong acid
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salt
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weak acid
Frage 40
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The radius of a gold atom is 144 picometer. Express this radius in centimeter.
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1.44 x 10 ^ -5 cm
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1.44 x 10 ^ -6 cm
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1.44 x 10 ^ -7 cm
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1.44 x 10 ^ -8 cm
Frage 41
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It is the property of matter that is independent of its surrounding condition and position.
Antworten
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weight
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mass
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density
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volume
Frage 42
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An example of a substance that cannot be further decomposed by ordinary chemical means is ______.
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air
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water
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salt
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iron
Frage 43
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A substance that can be further simplified may either be
Antworten
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a mixture or an atom
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a mixture of a compound
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an element or a mixture
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an element or a compound
Frage 44
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An example of chemical change is the
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burning of wood
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breaking of a glass bottle
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melting of an ice cube
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sawing of a piece of wood
Frage 45
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Chemical reaction may involve all of the following except
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separation of the molecules in a mixture
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breaking down of compounds into elements
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combination of atoms of elements to form a molecule
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reaction of a compound and an element to form a new compound and a new element
Frage 46
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Carbon - 14 has a half-life of approximately [blank_start]5600 years[blank_end]
Antworten
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5600 years
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5600 days
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5000 years
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600 years
Frage 47
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Which of the following has 4 significant figures?
Antworten
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1.68
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168.0
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0.0168
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0.00168
Frage 48
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An orbital can NEVER be occupied by
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1 electron
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2 electrons
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3 electrons
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0 electron
Frage 49
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A positively-charged ion has:
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more protons than electrons
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more electrons than protons
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an equal number of neutrons and electrons
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an equal number of protons and electrons
Frage 50
Frage
Sound is a form of energy produced by the vibration of matter. When an object produces sound, the vibration travels through space as
Antworten
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sound energy
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molecules
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sound wave
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radio wave
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