Chem Unit 1

How would you write 4.3756 x 10⁴ in standard form?

• 437,560,000
• 0.00043756
• 43,756
• 4,3756

Tags

CCSS.8.EE.A.3

How would you write 0.0005 in scientific notation?

• 50 x 10⁵

• 5 x 10^-4

• 5 x 10³

• .5 x 10³

When writing a number in scientific notation, the first number must be greater than 1, but less than 10.

• False
• True

Tags

CCSS.8.EE.A.3

Convert 17 m to cm:

• 0.17 cm
• 0.017 cm
• 1,700 cm
• 170 cm

Tags

CCSS.2.MD.A.2

490,000 g =____ kg

• 490
• 49
• 4,900
• 0.49

Is 20 g greater than, less than, or equal to 2 kg?

• greater than
• less than
• equal to

Tags

CCSS.5.MD.A.1

What is the basic unit of mass in the metric system?

• Liter

• Meter

• Gram

• Kilometer

Tags

CCSS.3.MD.A.2

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Tags

NGSS.MS-PS1-5

Students react baking soda & vinegar.
Which of the following would provide the evidence that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction?

• The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
• Bubbles were produced during the reaction, which meant that a gas was being produced.
• The plastic bag did not change in any way, indicating that it was not involved in the reaction.
• The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Suppose a reaction were to happen in an open container in a lab. During the reaction, the scientist observes the chemicals bubble, and produce a gas. During the analysis the scientist notices that the reactants weighed 20 g when he started, and the product weighed 18 g. Explain what happened.

• His chemical reaction defied the law of conservation of mass

• The product destroyed mass during the reaction

• The reactants created matter during the reaction

• The gas that was produced was not able to be weighed since the container was open.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5