Should we read in very dim light? Why or why not?
No, because it can cause eye strain.
Name three living things.
Animals, plants and humans.
Why can we see a luminous object?
Because its light enters our eyes.
What is our main source of light?
The Sun.
Do non-living things need water?
No, they do not.
Which soil holds the least water?
Sandy soil.
Which soil has an even mixture of sand, silt and clay?
Loamy soil.
Do non-living things breathe?
No, they do not.
What are objects that produce their own light called?
They are called luminous objects (light sources).
What happens when light hits a non-luminous object?
The light is reflected.
Why do we need light?
We need light to see things around us.
Can we see non-luminous objects in the dark?
No, we cannot.
What is soil texture?
The “feel” of the soil.
Can fireflies produce their own light?
Yes, they can.
Do non-living things grow?
No, they do not.
Is the Sun a natural or artificial light source?
The Sun is a natural light source.
What is excretion?
It is removing waste materials from the body.
What do we call objects that do not produce their own light?
Non-luminous objects.
What percentage of soil is organic matter?
5%.
How are rock particles formed?
They are formed from rocks eroded by wind and rain.
Do most objects produce their own light?
No, they do not.
How does light travel?
Light travels in a straight line.
What is a stimulus?
A change in the surroundings that causes a reaction.
What percentage of soil is rock particles?
45%.
How do fish breathe?
They breathe through their gills.
What are non-living things?
Things that are not alive.
How many main components does soil have?
Four.
Which soil is best for agriculture?
Loamy soil.
Why do living things need food?
To get energy and survive.
Name two natural light sources.
The Sun and stars. (Lightning is also correct.)
Name the four components of soil.
Rock particles, organic matter, air and water.
What are the three types of soil?
Sandy soil, loamy soil and clay soil.
What are living things?
Living things are things that are alive.
What is reproduction?
It is the process of having offspring (young ones).
Do non-living things need food?
No, they do not.
What is light?
Light is a form of energy.
Is the Moon luminous or non-luminous?
Non-luminous.
Why should we not look directly at the Sun?
Because it can damage our eyes.
What are the rock particles in soil?
Pebbles, sand, silt and clay.
Which soil holds the most water?
Clay soil.
Do plants move from place to place?
No, but they show small movements.
Do non-living things respond to stimuli?
No, they do not.
Can living things move by themselves?
Yes, they can.
Do living things need water?
Yes, they do.
Do living things grow?
Yes, they grow bigger and heavier.
What is humus?
Humus is decomposed plants and animals rich in nutrients.
What can we use to protect our eyes from bright sunlight?
Sunglasses.
Which soil has the smallest particles?
Clay soil.
Name one plant that grows well in sandy soil.
Cashew tree, peanut or coconut tree.
Name one artificial light source that uses electricity.
A light bulb. (Traffic light or street lamp are also correct.)
What is soil?
Soil is a thin layer of material covering the surface of the Earth.
Why can’t we see anything in a dark place?
Because no light enters our eyes.
Why is humus important?
It makes the soil fertile.
What happens to a plant without water for a long time?
It will wilt and may die.
What is glass made from?
Glass is made from sand.
Do living things need food?
Yes, they do.
Are candles natural or artificial light sources?
Artificial light sources.
Do living things need air?
Yes, they do.
Which soil feels coarse?
Sandy soil.
What are soil pores filled with?
Water and air.