1) What is matter?

a) Anything that is solid.b) Anything that takes up space.c) Anything that can be seen.

2) In what way are liquids different from solids?

A) Liquids don´t have a fixed shape, solids do.B) Liquids are always denser than solids.C) Liquids are made of atoms.

3) What happens to the chemical structure of water when it changes state?

A) Water mollecules melt into gas mollecules.B) Nothing happens to the chemical structure.C) Water mollecules harden into ice mollecules.

4) What will happen if you keep increasing both the pressure and temperature of a liquid?

a) It will boil.b) It will transpire.c) It will transpire.

• 5) What do lightning and stars have in common?

• A) Both have a fixed volume.• B) Both contain the three states of matter.• C) Both contain plasma.

• 6) Water´s chemical formula is H2O. What does this mean?

• A) Each water mollecule contains two hydrogen atoms and one oxygen atom.• B) A gram of water contains 20 hydrogen atoms.• C) Water mollecules cannot be split into smaller pieces.

• 7) What is the basic shape of a liquid?

• A) A sphere.• B) A cube.• C) Whatever shape of its container is.

• 8) How can you remove energy from matter?

• A) By increasing its volume.• B) By lowering its temperature.• C) By boiling it.

• Light

• 1) What is artificial light?• A) It is made when matter gives up energy in the form of light rays.• B) It is made when matter reflects light.• C) It is made when matter refracts light.

• 2) Name three examples of artificial light.• A) Stars-neon-light bulb.• B) Stars-firefly-angler fish.• C) Neon-candle-light bulb.

• 3) What is reflection?• A) Light travels fast and in a straight line, but when it hits an object it changes direction.• B) Light travels slowly and in a straight line, but when it hits an object it changes direction.• C) Light travels fast and in a straight line, but when it hits an object it doesn´t change direction.

• 4) What is refraction?• A) When light travels from one transparent material to another it bends, because light travels througn different materials at different speeds.• B) When light travels fast in a straight line.• C) When light travels from one transparent material to another it bends, because light travels at the same speed through different materials.

• 5) What is light?• A) An electric current.• B) Photons or discrete packages of energy.• C) A prism.

7)Name the 7 colors of the rainbow as the white light refracts.

a)Gold, white, purple, pink, red, blue, green.b)red, orange, yellow, blue, green, purple, pink.c) Black, white, red, blue, orange, green, pink.

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