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According to the Theory of Evolution, what sort of variation is inherited?
Variation is not inherited
What is the most likely reason why wasps and bees have black and yellow stripes?
The stripes warn other animals that wasps and bees are dangerous
The stripes are attractive to birds and other predators
The stripes make them look like harmless hoverflies, so they can sneak up on their prey
In the Carbon cycle, decay happens faster when the conditions are:
Warm and Dry
Cold and Moist
Warm and Moist
Cold and Dry
What is the most likely reason why animals in hot climates have larger ears than similar animals in cold climates?
It is more difficult to hear in hot air, so bigger ears are needed
Big ears lose heat quickly, while small ears lose heat slowly
Big ears are useful for creating a breeze when they are flapped quickly
During the early stages of the Earth's atmosphere Nitrogen and Carbon Dioxide were the most common gases. What caused the increased in the level of oxygen?
A coal-fired power station is 40% efficient. This means that:
40% of the chemical energy stored in coal is transferred to electrical energy
60% of the chemical energy stored in coal is transferred to electrical energy
40% of the chemical energy stored in coal is transferred to the surroundings as heat
60% of the chemical energy stored in coal is transferred to the surroundings as heat
The energy transferred by an electrical appliance can be calculated using this equation:
energy = power × time
How much energy is transferred by a 500 W electric drill in 30 seconds?
Which piece of evidence supports the Big Bang theory?
The more distant galaxies are moving the slowest.
The more distant galaxies are moving the quickest.
The more distant galaxies are moving towards us.
About how long ago do scientists believe the universe began?
13,700 million years
1,370 million years
137 million years
According to the Doppler effect, what happens to sound waves emitted at a constant pitch from a car moving towards you?
They move more quickly, so their pitch increases
Their frequency increases, so their pitch increases
Their wavelength increases, so their pitch increases