Welcome to your GRADE 7 GENERAL SCIENCE CHAPTER 2
After carefully reading the following 30 questions, choose the correct answer.
1.
What is defined as anything that has mass and occupies space?
2.
What is the mixing and spreading out of a substance with another substance due to particle motion?
3.
In which state of matter are particles closely packed and vibrate in fixed positions?
4.
Which temperature is defined as the melting point of ice?
5.
What is the mathematical formula for density (ρ)?
6.
Which of the following is an example of a chemical property?
7.
What is the process of changing a liquid to a solid called?
8.
Which separation technique is used to separate kerosene and water?
9.
What is the name of the liquid that passes through the filter paper during filtration?
10.
Which property is a characteristic of metallic substances like copper and aluminum?
11.
What is the process of changing a solid directly into a gas?
12.
Which states of matter are considered fluids?
13.
What is the unit for density mentioned in the text?
14.
Which of the following is a physical change?
15.
What separation technique is used to obtain common salt from sea water on a large scale?
16.
In filtration, what are the undissolved solid particles left behind on the paper called?
17.
Which technique is used to separate alcoholic beverages such as whisky and areki?
18.
Which state of matter has a fixed shape and fixed volume?
19.
What is the process of changing a gas to a liquid?
20.
Which technique separates iron and steel from non-magnetic objects like glass or plastic?
21.
What is the process of changing a gas directly into a solid?
22.
Which of the following is a chemical change?
23.
Which separation technique is shown by the example of drinking homemade coffee or tella?
24.
What describes the internal structure of a substance being affected to form a new substance?
25.
At sea level, what is the boiling point of water?
26.
Which state of matter takes the shape of its container but has a fixed volume?
27.
What occurs when vapor pressure of a liquid equals the surrounding atmospheric pressure?
28.
Which material can be drawn into thin wires (ductility), as mentioned in the text?
29.
What is the term for immiscible liquids being separated using a specific tool?
30.
According to the particle theory, what are the particles of matter always doing?
