Year 7 Science
Name at least four branches of Science
Chemistry, Physics, Astrology, Psychology etc.
What might happen to a food chain if one animal disappears?
Other animals might have less food, or some populations may grow too big.
Substances are classified as either a ......... or a .........
mixture or pure
Define forces.
Forces are a push or a pull on an object to change its motion.
If a place gets less rain than normal, what might happen to plants and animals?
Plants may dry out or die; animals may have less water and food.
What is the study of biology?
Study of all living organisms
In a food chain, the plant is known as a
Producer
What might happen if you crush something before putting it in water?
It will dissolve faster because the pieces are smaller.
If a surface is smooth, how might that change how fast something moves?
It will move faster on a smooth surface.
What do you think would happen to shadows if Earth turned more slowly?
Shadows would change more slowly during the day.
What do plants need to make their own food?
A. Moonlight
B. Sunlight
C. Sound
D. Wind
B. Sunlight
How can an introduced species impact an ecosystem?
disruption of food chain, competition, Predation of native species, spread diseases etc.
If you mix vinegar and baking soda, what do you think you will see?
It will fizz, bubble, and make gas.
How might a higher ramp change how far an object rolls?
The object will roll further or faster.
If Earth was tilted more, how might the seasons change?
Seasons would be more extreme—hotter summers and colder winters.
What force pulls objects down toward Earth?
A. Magnetism
B. Gravity
C. Friction
D. Electricity
B. Gravity
If a plant does not get enough sunlight, what do you think will happen?
The plant may grow slowly, turn yellow, or die.
What do you think would happen if you increased the temperature of a substance that dissolves slowly in water? Predict and justify.
It will dissolve quicker in the warm water.
What kind of contact force slows a moving object down?
Friction (add 100 to your total score)
Why do we experience day and night on Earth?
What do we call an animal that only eats plants?
A. Carnivore
B. Omnivore
C. Herbivore
D. Predator
C. Herbivore
Explain photosynthesis
is the process by which plants, algae, and some bacteria convert light energy into chemical energy stored in glucose (a type of sugar). It is essential for producing oxygen and providing energy for most life on Earth.
What is the chemical symbol for water and explain it.
How would you reduce friction? Give two examples.
You would add a lubricant, such as oil and grease (multiply your total score by 1.5)
Why do we have a leap year every 4 years?
We have a leap year because it takes 365.25 days to go around the sun. This caters for the extra quarter day each time we go round.