Reteach/Retest

select the element NOT present in this compound: MoPbClHO (Hint: use your periodic table)

• Lead

• Chlorine

• Hydrogen

• Plubonium

Tags

NGSS.MS-PS1-1

When water form a droplet it demonstrates _________, and when that droplet sticks to a leaf it demonstrates _________. (which answer puts the words in the correct order)

• cohesion, adhesion
• suction, pressure
• evaporation, condensation
• repulsion, attraction

What is a common property of acids and bases.

• Acids and bases are always solid at room temperature.
• Both acids and bases can conduct are corrosive.

• Both acids and bases have a pH of 7.
• Acids and bases do not react with each other.

In a chemical equation 10g of potassium reacts with 5g of hydrogen. What will be the mass of hydrogen product?

• 10g

• 15g

• 5.0g
• 2.5g

Tags

NGSS.MS-PS1-5

which is in order from most basic to most acidic. (water 7, orange juice 3, battery acid 0, baking soda 9)

• orange juice, water, baking soda, battery acid
• baking soda, water, orange juice, battery acid
• battery acid, orange juice, water, baking soda
• water, baking soda, battery acid, orange juice

Tags

NGSS.MS-PS1-2

What is the easiest way to tell if a model of a chemical equation correctly shows the law of conservation?

• The equation must be balanced in terms of charge.
• The equation should include a catalyst.
• The equation must have at least three elements.
• Check if the number of atoms for each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

Select all that represent a heterogeneous mixture

• Salad, sand and salt mixture, oil and water
• Coffee and Tea

• Sugar and water
• Gold

f a chemist has 10g of sulfur and 5g of water, is it possible to create and product with a total weight of 20g?

• Yes, it is possible.
• No, it is not possible.
• The total weight can be 15g.
• The total weight can exceed 20g.

Tags

NGSS.MS-PS1-5

Cohesion keeps water molecules together, and adhesion helps the water travel up xylem tubes, delivering water to all the cells of the organism. This statement describes what process?

• Photosynthesis
• Osmosis
• Evaporation of water off a pond

• Transport of water in plants

A student makes a model of glucose using colored beads: C6H1206. If carbon is blue, hydrogen is red, and oxygen is yellow, select the answer choice that shows the correct number of each bead/element.

• 6 blue, 12 red, 6 yellow
• 7 blue, 12 red, 5 yellow
• 6 blue, 10 red, 8 yellow
• 5 blue, 10 red, 5 yellow

Tags

NGSS.MS-PS1-1