أسئلة تدريبية في الفيزياء – الصف السابع – المنهج اللبناني

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Question 1

Which term matches this definition: "one of the tiny units that make up matter"?

Accepted Answer

particle (molecule). Particle (molecule): one of the tiny units that make up matter

Question 2

What is the meaning of "expansibility (of a gas)"?

Accepted Answer

the property of a gas to spread and fill all the space available. Expansibility (of a gas): the property of a gas to spread and fill all the space available

Question 3

15 g of salt are dissolved in 90 g of water. Mass of the salt water?

Accepted Answer

105. Mass is conserved: 90 + 15 = 105 g.

Question 4

5 g of salt are dissolved in 90 g of water. Mass of the salt water?

Accepted Answer

95. Mass is conserved: 90 + 5 = 95 g.

Question 5

A rectangular box measures 3 cm × 10 cm × 3 cm. Its volume in cm³?

Accepted Answer

90. V = 3 × 10 × 3 = 90 cm³.

Question 6

A measuring cylinder contains 140 mL of water. A stone is immersed and the level rises to 143 mL. Volume of the stone in cm³?

Accepted Answer

3. V = V₂ − V₁ = 143 − 140 = 3 mL = 3 cm³.

Question 7

What is the meaning of "relative density"?

Accepted Answer

the ratio of the density of a substance to the density of water, without unit. Relative density: the ratio of the density of a substance to the density of water, without unit

Question 8

Which term matches this definition: "staying at the surface of a liquid because the body is less dense than the liquid"?

Accepted Answer

floating. Floating: staying at the surface of a liquid because the body is less dense than the liquid

Question 9

Which term matches this definition: "the instrument that measures atmospheric pressure"?

Accepted Answer

barometer. Barometer: the instrument that measures atmospheric pressure

Question 10

Which term matches this definition: "the instrument that measures the pressure of a gas in a container"?

Accepted Answer

manometer. Manometer: the instrument that measures the pressure of a gas in a container

Question 11

Which term matches this definition: "the empty space between the particles of matter, very large in a gas"?

Accepted Answer

vacuum between particles. Vacuum between particles: the empty space between the particles of matter, very large in a gas

Question 12

Which term matches this definition: "the small loss of volume when two liquids mix, because small particles fit into the spaces between larger ones"?

Accepted Answer

contraction of volume on mixing. Contraction of volume on mixing: the small loss of volume when two liquids mix, because small particles fit into the spaces between larger ones

Question 13

What is the meaning of "temperature"?

Accepted Answer

the quantity, measured in °C with a thermometer, that tells how hot or cold a body is. Temperature: the quantity, measured in °C with a thermometer, that tells how hot or cold a body is

Question 14

Which term matches this definition: "the unit of temperature in which water freezes at 0 and boils at 100"?

Accepted Answer

degree Celsius. Degree Celsius: the unit of temperature in which water freezes at 0 and boils at 100

Question 15

90 g of ice melt completely. Mass of the water obtained?

Accepted Answer

90. Mass is conserved during a change of state: 90 g.

أسئلة الفيزياء الصف السابع مع الحل

15 سؤالاً تدريبياً في الفيزياء – الصف السابع

1. Which term matches this definition: "one of the tiny units that make up matter"?

2. What is the meaning of "expansibility (of a gas)"?

3. 15 g of salt are dissolved in 90 g of water. Mass of the salt water?

4. 5 g of salt are dissolved in 90 g of water. Mass of the salt water?

5. A rectangular box measures 3 cm × 10 cm × 3 cm. Its volume in cm³?

6. A measuring cylinder contains 140 mL of water. A stone is immersed and the level rises to 143 mL. Volume of the stone in cm³?

7. What is the meaning of "relative density"?

8. Which term matches this definition: "staying at the surface of a liquid because the body is less dense than the liquid"?

9. Which term matches this definition: "the instrument that measures atmospheric pressure"?

10. Which term matches this definition: "the instrument that measures the pressure of a gas in a container"?

11. Which term matches this definition: "the empty space between the particles of matter, very large in a gas"?

12. Which term matches this definition: "the small loss of volume when two liquids mix, because small particles fit into the spaces between larger ones"?

13. What is the meaning of "temperature"?

14. Which term matches this definition: "the unit of temperature in which water freezes at 0 and boils at 100"?

15. 90 g of ice melt completely. Mass of the water obtained?

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