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Is gravity a force?
yes
Are all metals magnetic?
NO
When is a material a good conductor?
Electricity can pass through them.
What is the process of a solid turning into liquid?
Melting
Which is the function of the liver?
Make bile and help to detox our body
Why are leaves important?
Because they make the food
Can we survive 7 days without food?
Yes but not without water
Is melting glass a reversible or irreversible change?
Reversible
Is copper a good conductor?
yes
What apparatus do we use to measure mass?
Scales or balance
Can an electrical circuit work without wires?
No
How do we call the poles of the magnet?
North and South
Why do we need gravity?
To stay on the ground.
What is the unit of weight?
Newtons
What is the unit of mass?
grams
What is a reversible and an irreversible change?
If you can get back to its original form it is a reversible change.
Which are the 3 states of matter?
solid, liquid and gas
What are food chains?
They represent feeding relationships.
How do we classify living things?
vertebrates and invertebrates, amphibians, reptiles, birds, fish, animals and plants, mammals
How do plants fertilise?
When ovules and pollen get together.
How long does it take to the Earth to make one complete rotation on its axis?
24 hs
How are shadows formed?
Light from a light source is blocked.
Name 5 measuring instruments.
measuring cylinder, ruler, sound level meter, forcemeter, balance
How does sound travel?
As waves, it can bend and it spread in all directions.
Which are the 3 laws of motion?
Inertia, force and action-reaction.
How do muscles work?
They work in pairs, when is contracted the other one relaxes.
Which are the steps in the plants life cycle?
germination, growth, pollination, fertilization, seed dispersal
Which are the 7 life processes?
nutrition, movement, growth, reproduction, respiration, excretion, sensitivity
Which are the 5 senses.
sight, hearing, touch, smell and taste
Name the process that changes water into vapour.
Evaporation
What is the melting point of water?
0°C
What is a solution?
A mixture of a soluble solid and a liquid.
What is the boiling point of water?
100°C
Which are the separaring methods?
Evaporation, sieving, filtration, by hand, magnetism.