Light/Electricity
Why does a mirror reflect light?
Because light bounces off smooth, shiny surfaces.
What is friction?
A force that resists motion between two touching surfaces.
Why do we have day and night?
Because the Earth rotates on its axis.
What happens if there’s a gap in a circuit?
The current stops flowing; the circuit is open.
Name 3 renewable energy sources.
Solar, wind, hydro (water).
Electricity flows only when a circuit is open.
False (it flows when circuit is closed)
The Sun moves around Earth
False (Earth moves around the sun)
What is the main function of the stomach?
To mix food with acid and enzymes to break it down.
Plants make oxygen
True or False?
True
What happens when ice melts?
It changes from solid to liquid (melting).
Evaporation turns liquid into solid.
True or False
False (it turns into gas)
What happens if a predator disappears from a food chain?
Prey population increases, causing imbalance.
Which organ pumps blood around the body?
The heart.