Darkness and Light
What is a light source?
This is what we call something that makes its own light, like the Sun or a candle.
What is the Sun?
This is the star at the center of our solar system.
What is electricity?
This is the flow of electric charge
What is a leaf?
This part of the plant makes food using sunlight.
This is what we call something that can dissolve in water, like sugar.
Soluble
What is a shadow?
his happens when an object blocks light and creates a dark shape.
What is the east?
The Sun rises in this direction.
What is a complete circuit?
This is needed to make electricity flow in a circuit.
What is photosynthesis?
This process is how plants make their own food.
This is what we call a material that does not dissolve in water, like sand.
Insoluble
What is translucent?
This type of material lets some light through, but not all.
What is rotation?
This is the pattern of day and night caused by Earth spinning.
What are the poles on a cell called?
Positive pole and negative pole
What are roots?
This part of the plant absorbs water from the soil.
This method is used to separate sand from water using a filter.
Filtration
Light travels in straight lines. Explain why you can only see objects when light reflects off them into your eyes.
because light must reflect off objects and enter our eyes to be seen
Explain why we experience day and night on Earth.
because Earth rotates on its axis
What is a battery (cell)?
This device provides energy to a circuit.
What is chlorophyll?
This is the green substance in leaves that helps capture sunlight.
A mixture contains sand and water. Explain how you can separate them.
By using filtration (or pouring through a filter to trap the sand)
A shadow changes size during the day. Explain why shadows are longer in the morning and evening but shorter at midday.
because the Sun’s position in the sky changes, affecting the angle of light
Explain how Earth’s tilt and movement around the Sun cause different seasons
because Earth is tilted as it orbits the Sun, changing how much sunlight different areas receive
Name 4 ways to stay safe with electricity.
Never touch plug with wet hands, never overload a multi socket, never touch damaged wires, dont use electrical devices in the bathroom.
Describe how water moves from the roots to the leaves in a plant and why this is important.
water travels through the Xylem to the leaves to help with photosynthesis and keep the plant alive? Xylem
A mixture contains sand, oil, and water. Describe how you can separate all three materials.
First remove sand using filtration, then separate oil and water because they do not mix (oil floats on water)