Year 7 Science Semester 1

Mixtures

100

Define solvent

solvent is a substance that has the ability to dissolve a given solute

200

What is it called when an undissolved substance sits at the bottom of a beaker

suspension

300

Identify the solute and solvent of cordial.

Solute: Cordial
Solvent: Water

400

What is it referred to when there is a little amount of solute in the solution.

Dilute

500

Define colloid and give an example

mixture in which extremely small particles of one substance are spread evenly throughout another substance
eg milk or butter

Separating Techniques

100

What piece of equipment is used to separate an insoluble substances from a solvent.

Funnel with filter paper

200

What technique is used to separate two soluble liquids

Distillation

300

What is the separation technique that mimics what happens in a washing machine

Centrifuging

400

What type of substances does chromatography separate?

Ink/Dye

500

Explain how evaporation works as a separation technique

Used to separate a soluble solid from a liquid. When heated the liquid changes state from a liquid to gas and hence only the solid is leftover

Atoms/Periodic Table

100

Name the three subatomic particles and their charges

Neutrons (no charge)
Protons (positive)
Electrons (negative)

200

What is majority of the periodic table made up of?

Metals

300

What is the name of the outer shell in an atom

Valence shell

400

How do you calculate the amount of neutrons in an atom

Atomic Mass - Atomic Number

500

How many electrons are in the outer shell of a phosphorus atom

5

Experimental Design

100

In what part of the practical report would you state the purpose of the experiment

Aim

200

Define what an independent variable is

The variable that is being changed/manipulated by the scientists

300

In what part of the practical report can you write personal pronouns

NO WHERE!

400

Outline the steps required to light a bunsen burner

1. Place bunsen burner on heatproof mat
2. Check gas hose for any holes and connect to gas tap
3. Ensure the air hole of the bunsen burner is closed
4. Light the match and turn the gas on
5. Hover lit match over the bunsen burner

500

Name three variables you would need to control if you were testing how the height a ball bounces is affected by different surfaces

• the height from which the ball is dropped
• the type of ball
• how much the ball has been used
• the method of dropping
• the technique used to measure the bounce height.

Earth in Space

100

What is the cause of day and night

Rotation of Earth

200

What is the two causes of the seasons

Tilt and revolution

300

What is the date of each of solstices and equinoxes in the southern hemisphere?

Summer Solstices - 21 December
Winter Solstices - 21 June
Autumn Equinox - 21 March
Spring Equinox - 21 September

400

During what moon phases does a Neap tide occur?

First and Third Quarter

500

Why is it harder to see a solar eclipse than it is to see lunar eclipse?

During a lunar eclipse, Earth casts a much bigger shadow on the Moon than the Moon casts during a solar eclipse on Earth