Matter
Matter is anything that has _______ and occupies _______.
mass.....space
Which 2 body systems enable movement?
Skeletal and muscular systems.
Heat gain or heat loss causes a change in _____ in an object.
Temperature or shape or volume
Energy is needed for most things to work or move. True or false?
False.
An object that gives off heat on its own is known as a _____ _____.
Heat source.
Name 3 non matter.
Music, light, lightning, sound, shadow, thunder.
(any 3)
What are 2 ways the skeletal system helps us?
It supports the body, gives us shape and protects vital organs. (any 2)
Name 1 use of a bimetallic strip.
Electric door bell or alarm system
Name 3 light sources.
Torch light, the sun, stars, fireflies, traffic light.
(any 3)
Which sense helps us to sense hot or cold?
Touch
What is a difference in property between a solid and a liquid?
How does the respiratory system help us?
It enables our bodies to take in oxygen and remove carbon dioxide.
How does placing a dented ping pong ball in hot water help?
The air in the ping pong ball gains heat from the hot water and expands, pushing it to its original shape.
I see things when light from a _____ _____ enters my eyes.
Light source.
Why is a thermometer better to measure the temperature than the sense of touch.
A thermometer gives more accurate measurement.
What can be used to measure the mass of an object?
A balance or electronic balance.
What are the 2 ways saliva helps in digestion?
Saliva softens and wets the food for easier swallowing. Saliva also breaks down/digests food.
What kind of surface reflects light and heat energy the most?
Smooth and shiny surface.
An object can be seen when it _____ light or when it is a _____ _____.
reflects.....light source
Why do the tiles crack on a hot day?
There are no small gaps to allow space for the tiles to expand.
What is a unit of volume?
Cubic centimetre (cm3) or
Litre (L) or Millilitre (ml)
What is the function of large intestine?
It absorbs water and mineral salts from the undigested food.
How does the thick fur of polar bear keep them warm?
The thick fur traps air which allows polar bear to lose heat slower as air is a poor heat conductor.
Why are noon day shadows the shortest?
The sun is directly overhead.
Why is a poor heat conductor suitable to keep hot food warm longer?
A poor heat conductor allows the hot food to lose heat slower.