SPS2

Elijah, Abigail, and William are conducting an experiment in their chemistry class. They noticed that a certain substance does not conduct electricity when dissolved in water. Which of the following could be a possible explanation for this observation?

• The substance could be an ionic compound, as boiling points for ionic compounds are lower than boiling points for covalent compounds.

• The substance could be a covalent compound, as boiling points for ionic compounds are higher than boiling points for covalent compounds.

• The substance could be either an ionic or a covalent compound, as boiling points for ionic compounds are approximately the same as boiling points for covalent compounds.

• The substance could be either an ionic or a covalent compound, as boiling points for ionic compounds are higher than boiling points for some covalent compounds and lower for other covalent compounds.

Tags

SPS2a

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What should be kept constant? 

• type of plant, flower pot,  soil, and amount of sunlight

• water, apple juice, milk

• only the amount of sunlight

• type of plant only

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

In an experiment to find out how the temperature affects the bounce height of a ball, the dependent variable is ...

• temperature

• bounce height

• the thermometer

• the ruler

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The one variable in an experiment that is purposely changed and tested by the scientist is the________________.

• dependent variable

• independent variable

• data

• control group

Tags

NGSS.MS-PS2-2

Research Question: Does the type of gasoline put in a car affect how fast the car can drive. What is the independent variable?

• Type of gasoline

• which car the gas is put into

• how fast the car can drive

• how much gas is put into the car

Tags

NGSS.MS-ETS1-2

NGSS.MS-PS3-1

NGSS.MS-PS3-4

What is the independent variable?

• cost of mowing

• Moe's Mowing Service

• $18

• Mowing Time

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method

• recipe

• data collection

• metric system

Tags

NGSS.MS-LS1-1

NGSS.MS-PS2-2

NGSS.MS-PS3-4

What is the independent variable on this graph?

• Number of push ups

• Days

During which month did Sam have a weight of 73 Kg?

• January

• February

• May

• March

What is the independent variable?

• Months

• Temperature

• Highs

• Lows