In a controlled experiment,

• there are at least two variables
• a control group is compared with one or more experimental groups
• a variable is not needed
• should only be conducted one time

A life scientist who observes the relationships between plants, animals, weather and soil on a mountaintop is studying a(n)

• community

• ecosystem

• population

• organism

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following statements best describes the composition of air?

• air is only made up of nitrogen

• air is only made up of oxygen

• air is only made up of carbon dioxide

• air is made up of a mixture of different gasses

Tags

NGSS.MS-PS1-1

Carbohydrates are made up of which monomers (smallest units)?

• amino acids

• nucleotides

• simple sugars (glucose)

• fatty acids

What can you find by working through the statements of a dichotomous key?

• how long a fungus can live
• when a species first appeared on Earth
• the scientific name of an organism
• how many animals are birds

The scientific name for a house cat is Felis catus. What is wrong with how this is written?

• the species should also be capitalized 

• the genus should also be lowercase

• the genus should be lowercase and the species should be capitalized

• the whole thing should be italicized

The diagram shows two different organisms, a plant and a bird. Which phrase best describes the classification of these two organisms?

• same kingdom, same species

• same kingdom, different species

• different kingdoms, different species

• different kingdoms, same species

Tags

NGSS.MS-LS4-2

The diagram shows a rock being placed in a graduated cylinder containing water. What is the volume of the rock? (Note: 1 mL = 1 cm³)

• 5

• 8

• 10

• 12

All good science begins with ______________.

• making observations and asking questions

• memorizing the textbook

• jumping jacks

• falling asleep during class

In science, models are used to ________________.

• simplify complex ideas

• share ones thoughts with others

• show how different parts work together

• all of the other options are good answers.

Tags

NGSS.MS-ETS1-4