4269479
Description
Question 1
Question
What is the function of a cell's nucleus?
Answer
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To act as a brain
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To control the movement of substances into and out of the cell
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To control the activities of the cell
Question 2
Question
What is the function of the ribosomes?
Answer
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To absorb light energy for photosynthesis
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To act as the site for protein synthesis
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To release energy by respiration
Question 3
Question
Metal atoms form...
Answer
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Ribosomes are the site of protein synthesis. Mitochondria are the site of energy release by respiration
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Ribosomes are the site of protein synthesis. Mitochondria are the site of energy release by respiration.
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Positive ions by losing electrons
Question 4
Question
Alveoli is another word for windpipe
Answer
- True
- False
Question 5
Question
In what period of its life is our Sun?
Answer
-
Main sequence
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Major sequence
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Minor sequence
Question 6
Question
A very massive star may explode at the end of its life. This is a....
Answer
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Supernova
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Neutron star
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Black hole
Question 7
Question
Respiration is a chemical reaction that happens in your cells
Answer
- True
- False
Question 8
Question
Why does sodium chloride have a lower melting point than magnesium chloride?
Answer
-
Its positive ions are smaller and have a smaller charge
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Its positive ions are larger but have a smaller charge
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Its positive ions are smaller but have a larger charge
Question 9
Question
When the diaphragm contracts, it moves down and there is more room, so air rushes into the lungs.
Answer
- True
- False
Question 10
Question
Which salt is made when calcium carbonate reacts with hydrochloric acid?
Answer
-
Sodium chloride
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Calcium chloride
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Calcium sulfate
Question 11
Question
The Alveoli are shaped like it is to increase the surface area
Answer
- True
- False
Question 12
Question
Carbon Dioxide and Water are produced from Respiration
Answer
- True
- False
Question 13
Question
The symbol equation for neutralisation is:
Answer
-
acid + alkali → salt + water
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H+(aq) + OH-(aq) → H2O(aq)
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H+(aq) + OH-(aq) → H2O(l)
Question 14
Question
A suitcase travels on a conveyor belt. What happens to its momentum if the belt speeds up?
Answer
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It increases
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It stays the same
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It decreases
Question 15
Question
What happens to the suitcase's momentum if the conveyor belt goes round a corner?
Answer
-
It stays the same
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It changes
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It is not possible to know
Question 16
Question
What happens to the total momentum of a firework when it explodes?
Answer
-
It increases
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It stays the same
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It decreases
Question 17
Question
When acids and alkalis dissolve in water...
Answer
-
Acids produce hydroxide ions and alkalis produce hydrogen ions
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Acids produce hydrogen ions and alkalis produce hydroxide ions
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Acids and alkalis produce hydrogen ions
Question 18
Question
Energy is released in stars by...
Answer
-
Nuclear fusion
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Nuclear fission
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Gravitational attraction
Question 19
Question
Stars form from dust and gas due to...
Answer
-
Nuclear fusion
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Nuclear fission
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Gravitational attraction
Question 20
Question
In around four billion years, what will our Sun become?
Answer
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A red dwarf
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A red giant
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A red super giant
Question 21
Question
Which of these is not a natural source of radiation?
Answer
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Food and drink
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Medical x-rays
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Cosmic rays
Question 22
Question
What do radiation badges do?
Answer
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They emit radiation for workers to use
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They monitor the radiation dose a worker receives
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They protect a worker from absorbing radiation
Question 23
Question
The half-life of an isotope is 1 hour. How long will it take for the count rate to fall to one-quarter of the starting rate?
Answer
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1 hour
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2 hours
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4 hours
Question 24
Question
Atom X has 7 neutrons and 7 electrons. It decays to form atom Y with 5 neutrons and 5 protons...
Answer
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The decay was alpha decay
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The decay was beta decay
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The decay was gamma decay
Question 25
Question
Atom X has 7 neutrons and 7 electrons. It decays to form atom Z with 6 neutrons and 8 protons
Answer
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The decay was alpha decay
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The decay was beta decay
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The decay was gamma decay
Question 26
Question
Organisms such as bacteria and Amoeba are described as [blank_start]unicellular[blank_end] while larger organisms are multicellular
Answer
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unicellular
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multicellular
Question 27
Question
The process of getting oxygen into your lung is [blank_start]breathing[blank_end]
Answer
-
breathing
Question 28
Question
A chemical process in your cells is [blank_start]respiration[blank_end]
Answer
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respiration
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breathing
Question 29
Question
Getting carbon dioxide out of your lungs through [blank_start]breathing[blank_end]
Answer
-
breathing
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respiration
Question 30
Question
[blank_start]Respiration[blank_end] takes place in mitochondria
Answer
-
Respiration
Question 31
Question
[blank_start]Respiration[blank_end] is a process that releases energy
Answer
-
Respiration
Question 32
Question
Respiration is the process that releases energy from food. Why is this done?
Answer
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In mammals - to maintain a constant body temperature
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To allow molecules to diffuse through membranes
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To enable muscles to contract
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To build larger molecules from smaller ones
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In plants - to build up sugars, nitrates and other nutrients into amino acids
Question 33
Answer
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Mitochondrion
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Cell Membrane
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Nucleus
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Cyptoplasm
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Nucleolus
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Centrioles
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Golgi Body
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Endoplasmic Reticulum
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Ribosome
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Microtubules
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Lysosome
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