Unit 1 and 2 Test Corrections

Which of the following is the simplest form  of a substance

• Chemical

• Element

• Compound

• Compound

When an object floats in a liquid, it --

• has a density that is similar to that of the liquid.

• is denser than the liquid. 

• has the same density as the liquid. 

• is less dense than the liquid

A student is trying to classify an unidentified, solid gray material as a metal or a nonmetal. Which question will best help the student classify the material?

• Will the material float in water?

• Does the material feel hard to the touch?

• Is the material malleable or ductile?

• Does the material feel rough or smooth?

Joseph is trying to determine the density of an object he found while on a nature walk. The object is a three inch cube and appears to be metal. Which of the following is not necessary for joseph to determine the density of the metal cube he found.

• Triple Beam Balance

• Ruler

• Graduated Cylinder

• Calculator

A student reads the label on the bottle of salad dressing shown below.

Oil, Vinegar, Spices

Shake Well Before Using.

Why would the student shake the salad dressing well before using it?

• Vinegar and oil have different densities.

• Vinegar and oil both contain water.

• Vinegar and oil are both liquids.

Which element does not make up a significant portion of the oceans?

• Hydrogen H

• Oxygen

• Sodium

• Phosphorus

Tags

NGSS.MS-PS1-1

A teacher puts two tablets in a glass of water. The teacher stirs the water with a spoon until the tablets start to bubble.

Which of the following is LESS dense than water?

• the glass

• the spoon

• the tablets

• the bubbles

Which of the following characteristic describes a non-metal?

• Good conductor of electricity

• Poor conductor of electricity

• Able to be stretched without breaking

• Shiny Appearance

What property best describes a metal?

• Not able to be stretched

• Poor Conductor of Electricity

• Breaks Easily

• Good conductor of electricity

Which of the following describes a metalloid

• Good ability to conduct electricity

• Poor ability to conduct electricity

• Average ability to conduct electricity

• No ability to conduct electricity