1 This question is about forces. Which of the following are examples of forces? Choose three correct
All food chains begin with a……………………………………..
In this food chain this is the…………………………………
This living organism gets its energy from the……………………….
(a) Explain how she can tell if a material is an electrical conductor
(b) Which material is a good conductor of electricity? Choose the correct answer
(c) Which material is not a good conductor of electricity? Choose the correct answer
(a) Choose one statement that is true about the flowers pollinated by insects.
(b) Why do many flowers pollinated by insects produce sweet nectar? choose three answers
5 This question is about sound.
(a) Decide if these sentences are true or false.
When a string of a guitar vibrates a sound is produced
A unit of loudness of sound is the decibel.
Sound travels at the same speed in all solid materials.
The speed of sound in space is the same as the speed of sound in air.
6 Mixtures can often be separated.
(a) Complete the followering
salt and water
steel powder and lumps of steel
steel powder and copper powder
(b) Angelique wants to separate a mixture of sand, iron powder and salt. She knows she must use the following steps
A. add water and stir
B. evaporate
C. filter
D. use a magnet
Put these steps in the correct order
(c) Angelique wants to separate a mixture of dried peas and sand. She uses a sieve rather than filter paper. Explain why she uses a sieve.
8 Mike is in a dark room.
He puts a puppet between a light source and a screen
(a) Light travels from the light source. Light is blocked by the puppet. A dark area appears on the screen. What is the name of this dark area?
(b) Mike moves the puppet.
He does not move the light source.
He does not move the screen.
Choose the size of image to the correct distance of puppet from Screen.
9 Gabriela investigates how a water clock works.
She accurately measures a volume of water.
She pours the water into a filter funnel.
She times how long it takes for the water to pass through.
She repeats this with different volumes of water.
(a) Which apparatus does she use to measure accurately the volume of water? Choose the correct apparatus
(b) Here are her results.
Chooose the correct table
(b)What did she forget to add to the headings in the table?
10 Seeds are dispersed.
(a) Sophia disperses seeds.
What kind of seed dispersal is Sophia using? Choose the correct answer
What kind of seed dispersal is Chen using? Choose the correct answer.
11 When a substance is mixed with water it may dissolve. Complete the sentences about adding substances to water.
(a) A liquid that dissolves a solid is called a…………………
(b) A substance that does not dissolve in water is……………………
(c) A substance that dissolves in water is……………………….
(d) A substance is dissolved in water.This substance is called the…………………………….
(e) The mixture of a substance dissolved in water is called a…………..
(a) Which planet takes the longest time to orbit the Sun? Choose the correct answer.
(b) Which planet has the shortest year? Choose the correct answer.
(c) The larger the orbit around the Sun the more days it takes to move around the Sun. Which two planets have a smaller orbit than the Earth? Choose the correct answers
(a) Pierre knows it is raining.
He uses his ears to hear the rain.
Explain how Pierre uses two other senses to know it is raining
Why is it important for Pierre to sense rain
14 Carlos investigates light. Look at his apparatus
Here are some statements made by Carlos.
What is each type of statement?
Choose the correct ones
(a) Hassan measures the length of one of the roots
What is the length of the root in millimetres?
(b) Look at their results after 6 days.
Describe two changes in the results compared to day 3.
first change…………………
(a) Substance B is stored at 0°C
The substance is heated until it reaches 200 °C
Describe the change of state of substance B while it is heated
(b) Substance F is stored at 0°C
The substance is heated until it reaches 200 °C
Describe the change of state of substance F while it is heated.
