ATAR Scientific Inquiry & Understanding

Question 1

What is the first step in the scientific method?

Accepted Answer

Observation

Answer

The scientific method typically begins with observation. This initial step involves noticing a phenomenon, asking a question about it, or identifying a problem that needs to be investigated. These observations then guide the subsequent steps of forming a hypothesis and designing experiments.

Question 2

What is a hypothesis?

Accepted Answer

A testable prediction

Answer

A hypothesis is a proposed explanation for an observed phenomenon that is testable through experimentation or further observation. It is an educated guess or a prediction that can be supported or refuted by evidence, serving as a foundation for scientific inquiry.

Question 3

What is the purpose of a control group in an experiment?

Accepted Answer

To serve as a baseline

Answer

In an experiment, a control group serves as a baseline for comparison. This group does not receive the experimental treatment or manipulation of the independent variable, allowing researchers to isolate the effects of the variable being tested. By comparing the experimental group to the control group, scientists can determine if the treatment caused a significant change.

Question 4

Which tool is used to measure volume accurately?

Accepted Answer

Graduated cylinder

Answer

A graduated cylinder is a tall, cylindrical laboratory vessel with precise markings (graduations) along its side. It is specifically designed to measure the volume of liquids accurately, offering greater precision compared to beakers or flasks, which are primarily used for mixing or holding liquids.

Question 5

Which of the following is a chemical change?

Accepted Answer

Burning paper

Answer

A chemical change results in the formation of new substances with different chemical properties. Burning paper is a chemical change because the paper reacts with oxygen to produce ash, smoke, and gases, which are entirely new chemical compounds. In contrast, melting ice, boiling water, and breaking glass are physical changes where the substance's chemical composition remains the same.

(ATAR) Australian Tertiary Admission Rank Practice Test

(ATAR) Australian Tertiary Admission Rank Practice Test

ATAR Scientific Inquiry & Understanding