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Science practice, Year 1–11
Short questions and lessons for science across the UK curriculum, with explanations for every answer. Free, with an optional game mode.
400 questions · free · no account needed · works offline once loaded
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Which sense helps you notice a flower's scent?
Options: Hearing · Smell · Sight
Answer: Smell
The nose is used for the sense of smell.
Which part of this chain is a plant: leaf → caterpillar → bird?
Options: Bird · Leaf · Caterpillar
Answer: Leaf
The leaf is part of a plant and starts this simple food chain.
Which group has six legs as an adult?
Options: Mammals · Insects · Spiders
Answer: Insects
Adult insects have six legs; spiders usually have eight.
What does opening a switch do in a simple circuit?
Options: Creates a new battery · Breaks the circuit · Makes the wire longer but still connected
Answer: Breaks the circuit
An open switch breaks the conducting path, stopping current.
Why is less energy available at higher trophic levels?
Options: Energy is transferred to surroundings and used in life processes · Every predator makes extra energy · Energy is never lost from the food pathway
Answer: Energy is transferred to surroundings and used in life processes
Not all biomass is eaten or absorbed, and respiration transfers energy to surroundings.
What is convection?
Options: Energy transfer only through a vacuum · A solid turning into a magnet · Energy transfer by movement of a fluid
Answer: Energy transfer by movement of a fluid
Warmer regions of a fluid can move, carrying energy with them.
What is natural selection?
Options: Organisms deliberately choose the genes they need · Every individual changes its DNA because it wants to · Inherited variants affecting survival and reproduction become more or less common
Answer: Inherited variants affecting survival and reproduction become more or less common
Differential survival and reproduction can change inherited allele frequencies over generations.
An object has mass 4 kg and g=10 N/kg. What is its weight?
Options: 40 N · 0.4 N · 4 N
Answer: 40 N
Weight = mg = 4×10 = 40 N.
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