Chemistry
What is a pure subtance?
A substance that is only made up on one type or particles?
What is a force?
Push, pull or twist
What is a herbivour?
Animal that only eats plants
What is the force that allows us to stay on the ground?
Gravity
What is a natural resource?
A resource that is naturally produced and has a natural life cycle.
What is the process called when a liquid turns into a solid?
Freezing
What unit of measurement are forces measured in?
Newtons
What is the secondary consumer in this food web?
Grass -> Mouse -> Cat -> Bear
Cat
True or False? The sun rotates around Earth.
What is one advantage of using natural resources
Answers will differ-teacher to decide.
What is one physical property that a substance can be separated by?
One of: density, size, weight, magnetism, solubility
What is the difference between a balanced and unbalanced force?
Unbalanced forces result in change in movement. Balanced forces result in no movement or steady movement.
What is the difference between a structural and behavioural adaptation?
Structural: the looks of an animal.
Behavioural: the way an animal acts
What is the phase of the moon that follows a new moon?
Waxing gibbous
If a mother is pushing a trolley at 300N and her child is helping and pushing at 70N. How much force is being pushed on the trolley?
370N
How could you separate sand and water?
Filtering
What are the 4 types of simple machines?
- Wheel and Axle
- Lever
- Incline Plane
- Pulley
How do you know if something is non-living or dead?
Non-living - was never alive - does not follow MRNGREWW
Dead - was once alive
Name 4 phases of the water cycle.
- Condensation
- Evaporation
- Run Off
- Transpiration
- Ground Water
What are the 3 main states of matter (300 points)?
Can you remember the 4th? (100 points)?
Liquid, solid and gas (300)
Plasma (100)
Describe what happens to the particles in a liquid as it heats and evaporates to a gas?
The particles in the liquid begin to move faster and faster and separate to become a gas.
Explain how a pulley works.
Pulleys are simple machines that can change the direction of force, making it much simpler for us to move objects.
What are the 2 risks of introducing a species?
- Puts pressure on the environment (over crowding)
- Competing for food
- Extinction if food sources run out
- Other (teacher validates)
Explain how the Earth experiences four seasons in a year.
The earths tilt and rotation around the sun. 1 rotation = 1 year.
What are the 4 branches of science we looked at this year? Must get the names correct.
Physical Science, chemical science, biological science and earth and space science.