Year 7 Science · Unit 3 · Lesson 12
Foundation Worksheet
Learning Goals
Match each statement to the correct force
Draw a line connecting each statement on the left to its correct match on the right. Or write the matching letter next to each statement. Then write E (electrostatic) or G (gravitational) in the Type column.
| Statement | Type (E or G) | Your answer | Description |
|---|---|---|---|
| Like charges | A. Pulls every object with mass toward Earth's centre | ||
| Unlike charges | B. Push apart, two negatives or two positives | ||
| Earth's gravity | C. Holds Earth and the planets across the Solar System | ||
| Charged balloon | D. Pull together, a positive and a negative | ||
| The Sun's gravity | E. Sticks to a wall without glue after being rubbed on hair | ||
| Rubbing materials | F. Transfers tiny charged particles so an object becomes charged |
Fill the gap
Choose the correct word from the word bank to complete each sentence. Two words will not be used.
When two materials rub together, tiny charged particles move across, so an object gains an electric . Two objects with the same kind of charge will each other. A positive object and a negative object will each other. The force between charged objects is called the force. The force that pulls any two objects with mass toward each other is the force. Gravity is stronger when the objects have a larger .
1. A student says: "Two balloons that both carry a negative charge will pull toward each other." Is the student correct? Explain your answer.
2. Name one everyday example of the electrostatic force and one everyday example of the gravitational force. Say which way each force acts.
Wrap Up
In one sentence, what was the main idea of this lesson?