Biology 7th - Diagnostic Test 2025

Which of the following is the first step of the scientific method?

• Conduct an experiment

• Make an observation

• Write a conclusion

• Collect data

A student wants to test how sunlight affects plant growth. What is the independent variable?

• The type of soil

• The type of plant

• The amount of sunlight

• The height of the plant

Why are safety rules important in the laboratory?

• To make the laboratory more fun

• To prevent accidents and injuries

• To shorten the time of the experiment

• To improve grades

What piece of equipment is used to measure the volume of liquid accurately?

• Beaker

• Graduated cylinder

• Test tubes

• Petri dish

If a chemical spills in the laboratory, what should a student do first?

• Leave the room quietly

• Clean it up quickly with paper towels

• Cover it with another container

• Tell the teacher immediately

Which option correctly lists the levels of organization from smallest to largest?

• Organ → Cell → Tissue → Organ system

• Cell → Tissue → Organ → Organ system

• Tissue → Cell → Organ system → Organ

• Organ system → Organ → Tissue → Cell

A forest with trees, animals, fungi, and rivers is an example of:

• Cell

• Organ system

• Ecosystem

• Organ

What level of organization best describes the human heart?

• Organ

• Tissue

• Cell

• Organ system

Blood is considered a tissue because:

• Pumps oxygen throughout the body

• Is made up of specialized cells that work together

• Can move by itself

• Is a liquid

The biosphere includes:

• A group of tissues

• A single ecosystem

• All organisms on Earth

• All ecosystems on Earth