Grade 7 General Science Questions

Which of the following groups of subjects are categorized under natural science?

• Biology, Chemistry and Physics

• Chemistry, Mathematics and Civics

• Civics, Mathematics and Physics

• Geography, History and Civics

Answer explanation

Natural science includes fields that study the natural world. Biology, Chemistry, and Physics are all branches of natural science, focusing on living organisms, substances, and physical laws, respectively.

Which of the following fields of natural sciences are included in physical science?

• Biology and chemistry

• Geology and physics

• Chemistry and physics

• Physics and biology

Answer explanation

Physical science primarily includes chemistry and physics, which study matter, energy, and their interactions. Biology, while a natural science, falls under life sciences, not physical sciences.

Which of the following is studied by Chemistry and Biology?

• The chemical reactions that take place in living things.

• The effects of forces that result in the formation of mountains.

• The refining of petroleum.

• The production of cosmetics.

Answer explanation

Chemistry and Biology both study the chemical reactions that occur in living organisms, which is essential for understanding life processes. The other options relate to geology, petroleum engineering, and cosmetics, not the intersection of these sciences.

Which of the following disciplines is placed in the overlapping area of chemistry and biology?

• Biochemistry

• Geochemistry

• Physical science

• Physical chemistry

Answer explanation

Biochemistry is the study of chemical processes within and related to living organisms, making it the discipline that overlaps chemistry and biology. The other options do not focus on this intersection.

Which of the following is not allowed in a laboratory?

• Wearing safety goggles

• Washing hands after an experiment

• Drinking water

• Using a lab coat

Answer explanation

Drinking water in a laboratory is not allowed due to the risk of contamination and exposure to hazardous substances. In contrast, wearing safety goggles, washing hands, and using a lab coat are essential safety practices.

Why should long hair be tied back in the laboratory?

• To prevent it from blocking your view

• To keep it cleans

• To avoid it catching fire or interfering with experiments

• To meet lab dress code requirements

Answer explanation

Long hair should be tied back in the laboratory to avoid it catching fire or interfering with experiments. This is crucial for safety and maintaining a clear workspace.

Which of the following is the correct way to handle chemicals in the lab?

• Taste the chemicals to identify them

• Pour leftover chemicals back into their original containers

• Read labels and handle chemicals according to instructions

• Mix chemicals without consulting the experiment procedure

Answer explanation

The correct way to handle chemicals is to read labels and follow instructions. This ensures safety and proper usage, unlike tasting, pouring back, or mixing without guidance, which can be dangerous.

What should you do immediately after a chemical spill in the lab?

• Continue with the experiment

• Report the spill to the instructor and follow cleanup protocols

• Leave the spill unattended

• Cover it with a paper towel and ignore it

Answer explanation

Immediately report the spill to the instructor and follow cleanup protocols to ensure safety and proper handling of hazardous materials. Ignoring or mishandling a spill can lead to dangerous situations.

What is the proper way to handle broken glass in the lab?

• Pick it up with bare hands and throw it in the trash

• Use a broom and dustpan to clean it up and dispose of it in a designated glass waste container

• Leave it on the floor and inform others to avoid the area

• Wash it with water and reuse it

Answer explanation

The correct way to handle broken glass is to use a broom and dustpan to safely collect it, preventing injury. It should then be disposed of in a designated glass waste container to ensure proper handling and safety.

In which one of the following branches of natural science are properties of materials studied?

• Astronomy

• Biology

• Chemistry

• Geology