T2 Science

Properties depend on the quality of the air. True. False.

Air is matter. True. False.

The state of matter depends on the atomic structure. True. False.

Extensive properties are mass, volume, amount and shape. True. False.

The sun is comparable to the nucleus of an atom. True. False.

Scientists compare the Solar System with molecules. True. False.

Electrons orbit the nucleus due to gravitational force. True. False.

How can we tell one element apart from another?. By their atomic number. According to their atomic masses.

How are the elements ordered?. By their atomic number. According to their atomic masses.

Protons are positively charged of an atom?. True. False.

Match the state of matter to their characteristics. Gas. Liquid. Solid.

Whats the name of this state of matter?.

Whats the name of this state of matter?.

Whats the name of this state of matter?.

Match the concept to their meaning. Friction. Adhesion. Density.

How do you call an atom that loses or gains electrons?. Ions. Molecules.

How are elements represented?. With one or two letters. With a number.

What are the elements that cause friction?. Electromagnetic forces and irregular surface. Molecular adhesion.

How can you calculate density?. Dividing an objects mass by its volume. Multiplying an objects mass by its volume.

If something is denser than water___________ if something is less dense _______. It will float and it will sink. It will sink and it will float.

Match the colums. It builds up when a lot of electrons transfer from one object to another... The fromula of pressure is... If 2 charged objects are near each other, they produce...

Objects with _______ charges attract each other. Opposite. Similar.

Objects that ______ each other have similar charges. Repel. Attract.

When an atom ______, it acquires a _________. Gains electrons; negative charge. Gains electrons; positive charge. Loses electrons; negative charge. Loses electrons; positive charge.

Electrostatic _______ can be perceived as shocks, crackling noises or _______. Discharges; sparks. Discharges; glimmers.

What are the 3 main points of kinetic energy. Matter is composed by smaller particles. There is a sapce between particles. The particles are constantly moving. It takes just one form.