Science Checkpoint 6.5A,6.5B, 6.5C, 6.6A

Earth's atmosphere is made up mostly of which elements? (6.5B)

• Carbon dioxide and oxygen

• nitrogen and helium

• helium and carbon dioxide

• nitrogen and oxygen

Tags

NGSS.MS-PS1-1

Look at the circle graph of the different elements in Earth's crust.

Based on the graph, which conclusion can be drawn about the elements in Earth's Crust? (6.5B)

• Iron is more abundant than sodium.

• Silicon is more abundant than oxygen.

• Aluminum is more abundant than silicon.

• Calcium is more abundant than magnesium.

Which word describes two or more elements that are mixed together in a fixed proportion? (6.5C)

• mixture

• Compound

• Element

• Atom

A scientist isolates an element during an experiment. How can he know that it is an element? (6.5C)

• It is made up of only one type of atom.

• It is made up of exactly two types or atoms.

• It is in the periodic table.

• It has characteristics.

Tags

NGSS.MS-PS1-1

A student is given a sample of an unknown substance. He is asked to determine if it is classified as a metal, a metalloid, or a nonmetal. He discovered that the unknown element conducted some heat and electricity, had a shine luster, and broke easily. this element is most likely a (6.6A) -

• metal

• nonmetal

• metalloid

• cannot be determined

Which of the following correctly list the three main groups of elements from greatest conductivity to least conductivity? (6.6A)

• Nonmetals-metalloids- metals

• metals-nonmetals-metalloids

• metalloids-metal-nonmetals

• Metals-metalloids-nonmetals

John was observing the physical properties of elements in order to classify them as either a metal, nonmetal, or metalloid. The first element was dull, brittle, and do not conduct heat, what is the element most likely classified as (6.6A)

• metal

• metalloid

• nonmetal

Every minute we are creating a new substance when we inhale oxygen since inside the body there is a chemical reaction. What is the new substance created when we exhale breath? (6.5C)

• Calcium carbonate

• carbon

• carbon dioxide

• dioxide

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which element makes up most of the element of the Earth's crust? Write the element names and its chemical symbol. (6.5A)

Tags

NGSS.MS-PS1-1

How many elements are involved in the reaction shown below? (6.5A)

C3H8+5O2---------- 3CO2 + 4H20

• 7 elements

• 3 elements

• 17 elements

• 19 elements

Tags

NGSS.MS-PS1-1