Matter
Everything is made of matter. True or false?
False
What is a system made of?
A system is made of different parts.
What are the 3 parts of a plant system?
Roots, stem and leaves.
Give 2 examples of translucent objects.
Frosted glass, tracing paper, shower curtains, tissue paper. (any 2)
What is the regular afternoon air temperature in Singapore?
27-33 C
Mass is the amount of ________ in an object.
matter
Which 3 parts in the digestive system digest food?
The mouth, stomach and small intestine.
What are the 2 functions of the roots?
The roots anchor the plant firmly to the ground and absorbs water and mineral salts from the soil.
When an object is moved nearer the light source, the shadow _______ in size.
Increases.
What is a difference between Heat and Temperature?
Heat is a form of energy but temperature is a measurement of heat energy.
Volume is the amount of _______ taken up by an object and can be measured by using a ________.
space...... measuring cylinder or syringe
How does the teeth help in digestion?
The teeth chew and grind food into smaller pieces to speed up digestion.
Name 2 ways the stem helps the plant?
The stem supports the plant, keeps the plant upright and transports food and water for the plant. (any 2)
When an object is moved further away from the screen, the shadow _______ in size.
Decreases.
The gain or loss of heat by an object causes a change in _______.
Temperature
What is a difference in property between a liquid and a gas?
A liquid has definite volume but a gas does not have definite volume.
How does the circulatory system help us?
It transports digested food and oxygen to all parts of the body and carries carbon dioxide and waste away from the body.
What are the 2 functions of the leaves?
The leaves make food for the plant and help the plant to exchange gases with the surroundings.
When _____ _____ is blocked by an object, a bigger shadow is formed.
More light
Why are overhead cables hung loosely?
To allow them to contract during cold days, preventing them from snapping.
Why cant we measure the volume of a floating object using water displacement method?
The volume is not displaced by water.
How do the tiny folds in the wall of small intestine help in digestion?
They increase the exposed surface area of the small intestine for faster absorption of digested food into the body.
By shapes, sizes and colours.
We can change the shape of shadows by changing the _______ of the object or the _____ of the light source.
Orientation.....position
What affects the amount of heat energy of a substance?
The volume and the temperature