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