Materials
What do we call a change that can be undone?
Reversible change
How long does Earth take to orbit the Sun?
About 365 days / 1 year.
What is the first stage of a butterfly's life cycle?
Egg
What force pulls objects towards Earth?
Gravity
A scientist tested three parachutes three times each. Why repeat the tests?
To improve reliability and calculate an average.
Name one material that is a good thermal insulator.
Wood, plastic, rubber, air
What causes day and night?
Earth rotates on its axis.
What is the young stage of a frog called?
Tadpole
Which force slows a bicycle when the brakes are applied?
Friction
What do we call the thing we measure in an investigation?
Dependent variable
Which material is a better thermal conductor: wood or steel?
Steel
What is the difference between rotation and revolution?
Rotation = spinning; revolution/orbit = moving around another object.
Put these in order: Adult, Egg, Pupa, Caterpillar.
Egg → Caterpillar → Pupa → Adult
Why does a parachute make a skydiver fall more slowly?
It increases air resistance.
Students measured the height of a plant every Monday for six weeks. Which graph should they use?
Line graph
Name TWO signs that a chemical reaction has taken place.
Any two: gas produced, colour change, temperature change, new substance, light
What is the name of the path Earth follows around the Sun?
Orbit
Which animal changes from breathing with gills to breathing with lungs?
Frog
Which surface would create the most friction: ice, tiles or carpet?
Carpet
Which is the fair test? A) Changing parachute size only B) Changing size and drop height together
A
A cooking spatula (spoon) is made of metal, but the handle is plastic. Why?
Metal transfers heat well; plastic is an insulator that protects your hand.
Why do we see different phases of the Moon?
Because the Moon orbits Earth and we see different amounts of its sunlit side.
What is metamorphosis? Give one example.
A major change in an animal's body during its life cycle. Example: a frog changing from a tadpole into an adult frog.
A paper helicopter falls faster after its wings are made smaller. Which force changed, and how?
Air resistance decreased, so it fell faster.
Name the independent variable, dependent variable and one control variable in a parachute investigation.
IV: parachute size; DV: time to fall; CV: drop height (or material, release method, etc.)