02.CI.Science.G08.CRM3.2_2020

Anything that has mass & takes up space

• gravity
• force
• matter
• volume

Tags

NGSS.MS-PS1-1

Smallest unit of an element

• compound
• atom
• molecule
• product

Tags

NGSS.MS-PS1-1

An oreo cookie weighs 20 grams.  It gets crushed into crumbs for a recipe.  How much do its crumbs weigh?

• 15 grams
• 25 grams
• 20 grams

Tags

NGSS.MS-PS1-5

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

A 55-gram egg is placed in a pot. After the egg is boiled, which is most likely the mass of the egg?

• 50 
• 55 

Tags

NGSS.MS-PS1-4

The principle of conservation of mass is true for

• Physical Changes
• Chemical Changes
• Neither
• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

• 500 grams, because the cheese does not gain or lose mass just because it was melted
• 499 grams, because some of the cheese evaporates as it melts
• 502 grams, because the cheese absorbs heat as it melts

Tags

NGSS.MS-PS1-5

Which process is an example of a PHYSICAL CHANGE?

• cutting something into smaller pieces

• changing pH of a substance

• creating a new substance

• elements combining to form an acid

Which process is an example of a PHYSICAL CHANGE?

• Hydrogen and Oxygen combining to form water, which is 95% of a cucumber

• A cucumber and tomato salad being digested by enzymes in your stomach

• Carbon, Oxygen and Hydrogen combining to form ferulic acid, a compound found in a cucumber

• cutting a cucumber into slices and placing them on your eyes to relax

Mrs. Keen decides to do a demonstration for her class with a piece of rock. Using a balance, Mrs. Keen determines that the mass of the rock is 46 grams (g). She then takes the piece of Rock and crushes it into a fine powder and measures the mass of the powder. What would be the result of Mrs. Keen's demonstration?

• The mass of the powder would be LESS than the mass of the rock because of a change of state.

• The mass of the powder would be GREATER than the mass of the rock because of a change in shape of the matter.

• The mass of the powder would be LESS than the mass of the rock because of a change in particle size of matter.

• The mass of the powder would be the SAME as the mass of the rock because the matter changed in size but not amount.