Elements, Compounds and Physical Changes

An element is ________ substance made up of only one kind of atom.

• chemically combined

• a pure

• a molecule

• symbol

Tags

NGSS.MS-PS1-1

Which of the following is an ELEMENT?

• NaCl

• CO₂

• O₃

• HCl

If a substance CANNOT be separated into a simpler substance it is _________________________.

• a solution

• a mixture

• a compound

• an element

When you combine zinc(Zn) and hydrochloric acid(HCl) a chemical reaction occurs. Which of the following statements is TRUE?

• Zinc(Zn) and hydrochloric acid(HCl) are both compounds.

• Zinc(Zn) is an element. Hydrochloric acid(HCl) is a compound.

• Zinc(Zn) and hydrochloric acid(HCl) are both elements.

• Zinc(Zn) is a compound. Hydrochloric acid(HCl) is an element.

Tags

NGSS.MS-PS1-1

A coumpound is ____________________________.

• made up of only metals

• found on the Periodic Table of Elements.

• NOT able to be divived into simpler substances.

• made up of two or more different elements.

Tags

NGSS.MS-PS1-1

All of the following are examples of a physical change EXCEPT________________________.

• a change in temperature

• a change in shape

• a change in size

• a change in state of matter

A physical change happens when ______________________.

• electricity flows in a wire

• ice cream melts into a liquid

• dough bakes in an oven

• a color change occurs

Tags

NGSS.MS-PS1-4

If the elements Sodium and Chlorine combine to form NaCl, the new substance is ________________.

• an element

• a mixture

• a solution

• a compound

Tags

NGSS.MS-PS1-1

Neon, Argon, and Mercury are all examples of ______________.

• fossil fuels

• elements

• compounds

• mixtures

Which of the following is NOT an example of a physical change?

• sugar dissolving in lemonade

• glass breaking

• water evaporating from a tabletop

• a garbage can rusting