Mr. Corrigan Science Test

Which of the following is a property of pure substances?

• They can be separated by physical means

• They have a fixed composition

• They are always mixtures

• They contain multiple phases

Tags

NGSS.MS-PS1-4

Abigail is building a model of the solar system for her science project. She wants to understand what the basic building block for all matter is. What should she learn about?

• Molecule

• Atom

• Compound

• Mixture

What does O₂ represent?

• A single oxygen atom

• Two oxygen atoms bonded together

• Three oxygen atoms bonded together

• A molecule of water

Tags

NGSS.MS-PS1-1

Evelyn is conducting an experiment in her chemistry class. She needs to identify the element represented by the letter 'O' in a chemical formula. Which element is it?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

Samuel is conducting a science experiment where he combines two hydrogen atoms with one oxygen atom. What is the chemical formula for the compound he creates?

• H2O

• CO2

• H2

• O2

Tags

NGSS.MS-PS1-1

Charlotte is conducting an experiment with water. She notices the formula H2O and wonders, what does the '2' in H2O represent?

• Two molecules of water

• Two oxygen atoms

• Two hydrogen atoms

• Two electrons

Tags

NGSS.MS-PS1-1

Evelyn is conducting an experiment to determine the composition of a pure substance. What will she observe about its composition?

• It varies with temperature.

• It varies with pressure.

• It doesn’t vary.

• It varies with location.

Tags

NGSS.MS-PS1-1

What does the example of trail mix illustrate about mixtures?

• They are chemically bonded

• They are pure substances

• Ingredients do not change when combined

• They are consistent throughout

Mia is observing ice melting into water. What is the effect of this physical change on the chemical composition of the substance?

• It changes

• It remains the same

• It becomes unstable

• It becomes a new element

Tags

NGSS.MS-PS1-4

Elijah is baking bread at home. What type of change is bread rising?

• Physical change

• Chemical change

• State change

• Mixture change