Science Quiz for Kids
Questions: 16 · 10 minutes
1. Which process allows a green plant to use sunlight to make sugar?
Respiration
Photosynthesis
Transpiration
Germination
2. What force keeps planets moving in orbits around the Sun?
Gravity
Sunlight
The planets’ rotation
Magnetism
3. A toy is between a flashlight and a wall. If the toy moves closer to the flashlight while the wall stays still, what usually happens to the toy’s shadow on the wall?
It becomes smaller
It becomes larger
It disappears completely
It stays exactly the same size
4. A cup contains water mixed with insoluble sand. Which method is best for separating the sand while letting the water pass through?
Pouring the mixture through filter paper
Freezing the whole mixture
Using a magnet
Stirring the mixture faster
5. Which organs remove many wastes and excess water from the blood to make urine?
Heart
Lungs
Stomach
Kidneys
6. After rain, a shallow puddle slowly disappears on a warm day even though nobody touches it. Which process best explains this?
Condensation
Evaporation
Freezing
Precipitation
7. When baking soda and vinegar are mixed, many bubbles form. What do the bubbles provide evidence that the reaction produced?
Matter that was completely destroyed
A new solid that sank immediately
A temperature of exactly zero degrees
A gas
8. What happens to the particles in ice as the ice melts into liquid water?
They lose all their energy
They turn into entirely new kinds of molecules
They gain energy and can move past one another
They become fixed in place and move more slowly
9. In a grassland, foxes eat rabbits. If the number of foxes suddenly decreases and other conditions stay the same, what is most likely to happen first?
The fox population immediately increases
All the grass disappears at once
The rabbit population begins to increase
Decomposers stop breaking down dead matter
10. Four identical plants receive different amounts of fertilizer. To make this a fair test of fertilizer amount, what should the investigator do?
Give every plant a different amount of water too
Keep light, water, soil, and plant type the same
Place each plant in a different kind of soil
Measure only the plant that grows tallest
11. A metal spoon is left in a bowl of hot soup, and its handle becomes warm. How did most of the heat travel through the spoon?
By conduction through the metal
By evaporation inside the metal
By freezing along the handle
By radiation from the Moon
12. Which body system carries oxygen and nutrients in the blood to cells around the body?
Circulatory system
Digestive system
Nervous system
Skeletal system
13. Why does the Moon appear to have different shapes during the month?
The Moon produces changing amounts of light
Earth’s shadow covers a different part of it every night
We see different portions of its sunlit half as it orbits Earth
Clouds regularly hide fixed sections of the Moon
14. Why can a thick winter coat help keep a person warm?
The coat produces a new supply of body heat
The coat turns body light into heat
The coat prevents the body from using oxygen
Air trapped in the coat slows heat transfer away from the body
15. Two astronauts outside a spacecraft cannot hear each other shout directly, even when they are nearby. Why?
Their voices become too heavy in space
Gravity pulls every sound toward Earth
Space lacks the particles needed to carry sound between them
Sunlight blocks sound waves
16. A scientist finds a fossil shell preserved between flat layers of rock. In which type of rock was it most likely found?
Igneous rock
Magma
Metamorphic rock formed under intense heat
Sedimentary rock