1. What characteristic must be true of a good hypothesis?

• It must be correct.

• It must involve quantitative data.

• It must have been observed many times.

• It must be testable by observation or investigation.

In an experiment, the variable that is changed is the:

• controlled variable

• dependent variable

• independent variable

• experimental variable

Tags

NGSS.MS-PS2-2

In an experiment, the variable that we measure is the:

• controlled variable

• dependent variable

• independent variable

• experimental variable

A scientist has a hypothesis that the temperature at which a chicken’s egg is hatched will determine whether the chicken is male or female. The independent variable is:

• the incubator

• the temperature

• the female chicken

• the gender of the chicken

Tags

NGSS.MS-LS4-4

A scientist has a hypothesis that the temperature at which a chicken’s egg is hatched will determine whether the chicken is male or female. The dependent variable is:

• the incubator

• the temperature

• the size of the chicken

• the gender of the chicken

A scientist conducted a practical investigation to determine how the amount of salt in water affects the number of fish that can live in the water. The independent variable is:

• the water

• the temperature of the water

• the amount of salt in the water

• the number of fish in the water

A scientist conducted a practical investigation to determine how the amount of salt in water affects the number of fish that can live in the water. The dependent variable is:

• the water

• the temperature of the water

• the amount of salt in the water

• the number of fish in the water

All the things in an experiment that must be the same to make it fair are called:

• controlled variables

• dependent variables

• independent variables

• controlled experiments

A student is investigating how long it takes parachutes of different sizes to reach the ground. What is the independent variable?

• the size of the parachute

• the mass of the object carried by the parachute

• the height from which the parachute is dropped

• the time it takes for the parachute to reach the ground

In a practical investigation you use graphs when:

• analysing data

• asking questions

• making a hypothesis

• writing an inquiry question