Bundle 1 Test Corrections

How many DIFFERENT elements are involved in the reaction shown?

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The names and chemical formulas of four substances are shown in the chart. Which substance is made of the most atoms?

• Acetate

• Sodium hydroxide

• calcium carbonate

• copper sulphate

Tags

NGSS.MS-PS1-1

In the chemical reaction shown below, the products are best classified as –

• 2 elements

• 2 compounds

• 1 compound and 1 element

• 2 compounds and 1 element

Tags

NGSS.MS-PS1-1

Adrenaline is a hormone secreted by the adrenal glands, especially in conditions of stress, increasing rates of blood circulation, breathing, and carbohydrate metabolism and preparing muscles for exertion. The formula for one molecule of adrenaline is shown below.

C₉H₁₃NO₃

How many atoms in all are in a molecule of adrenaline?

Tags

NGSS.MS-PS1-1

Which of these formulas contain equal numbers of oxygen atoms?

• 1 and 2

• 1 and 3

• 1. 1, 3 and 5

• 2 and 4

Tags

NGSS.MS-PS1-1

A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about burning sugar provides evidence of a chemical reaction?

• The sugar melts and becomes a liquid

• Heat is added to the sugar crystals

• The temperature of the sugar increases

• Gas is produced as the sugar turns black

Tags

NGSS.MS-PS1-2

Your science teacher is doing a demo and spills a few drops of dilute hydrochloric acid (HCl) on a lab table. Using the lab safety guidelines provided, the teacher sprinkled some baking soda (NaHCO₃) onto the spill. Which observation by the students would provide the best evidence of a chemical reaction?

• The hydrochloric acid evaporated, leaving only the baking soda

• The baking soda and hydrochloric acid combined, and bubbles formed

• Some of the baking soda dissolved in the hydrochloric acid

• The baking soda absorbed the hydrochloric acid

Tags

NGSS.MS-PS1-2