CHEMISTRY
The mantle is solid, yet it can still move slowly. What property allows this?
Extreme heat and pressure make it soft/plastic enough to flow slowly.
What is the original source of energy in most food chains?
The Sun is the original source of energy in most food chains.
3. What force pulls objects towards the Earth?
Which liquid is the most acidic, and which is the most alkaline?
Why do ships appear to sink as they move away across the ocean?
Because the Earth is curved.
Arrange this food chain in the correct order:
Snake, Grass, Hawk, Grasshopper
Grass → Grasshopper → Snake → Hawk
3.What type of energy does a moving object have?
3.Kinetic energy.
Muscle cells need more energy for movement, so they contain more mitochondria to release energy during respiration.
Explain why the inner core is solid even though it is hotter than the outer core.
The pressure at the center is so high it prevents the iron and nickel from melting.
In a food chain, what is a producer?
A producer is an organism, usually a plant, that makes its own food using sunlight.
3. What happens when a switch is open?
What makes a scientific model reliable?
It matches evidence and can explain observations accurately.
state the four layers of the Earth starting from the outermost to the innermost.
crust, mantle, outer core, inner core
What process in the water cycle forms clouds?
Question 7
Condensation forms clouds.
2.Why must a circuit be closed for a bulb to light
There may be a break in the circuit, such as a loose wire or a switch left open.
How can movement in the mantle affect the Earth’s surface?
It can cause volcanoes, earthquakes, mountain formation, and plate movement.
The two extras for the mix
Describe the complete water cycle.
The Sun heats water causing evaporation. Water vapour rises and cools to form clouds through condensation. Water falls as precipitation such as rain. The water collects in rivers, lakes, and oceans, and the cycle repeats.
2.Give two effects of force on an object
Explain how energy moves through a food chain.
Energy starts from the Sun, moves to plants (producers), then passes to animals when they eat plants or other animals. Some energy is lost as heat at each stage.