Fast Science

A series of steps used by scientists to solve a problem or answer a question. 

• scientific method

• recipe

• data collection

• metric system

Tags

NGSS.MS-PS2-2

What is the difference between an independent and dependent variable?

• independent variable is what you change in the experiment, dependent variable is the result of the change

• dependent variable is what you change in the experiment, independent variable is the result of the change

• independent variable is altered and dependent variable is altered too

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

A prevailing theory about heredity is challenged by newly discovered information from a few experiments. As a result, what might happen to the scientific knowledge about heredity?

• A new theory will immediately be established.

• All that is known about heredity will be erased

• Nothing because scientific knowledge cannot change once it is established.

• Scientific knowledge may change and grow over time.

The outside layer of the earth is called ______________________.

• core

• crust

• mantle

• outer core

What will happen when these magnets are brought close together?

• They will attract each other.

• They will repel each other.

• Both magnets will turn to the left

• Both magnets will turn to the right

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which form of matter lacks a fixed shape but has a definite volume?

• Gas

• Solid

• Liquid

• Plasma

Tags

NGSS.MS-PS1-4

Which form of matter lacks a fixed shape and volume?

• Gas

• Solid

• Liquid

• Plasma

Tags

NGSS.MS-PS1-4

Two wires carrying electricity can create a spark if they come too close together. This spark can start a fire. Wires carrying electricity are usuallly covered  with plastic to keep them from starting a fire. Why does the plastic keep electricity from starting a fire?

• Plastic is a good insulator.

• Plastic can melt when heated.

• Plastic is softer than wire.

• Plastic conducts electricity.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Erosion is one of the processes involved in the formation of sedimentary rock. Which of these best describes the process of erosion?

• Rocks are broken into smaller pieces that remain in the same location.

• Pressure compacts layers of sediment and turns them into rock.

• Pieces of rock or soil are carried from one place to another.

• Sediment grains fall to the bottom of a lake to form sedimentary layers.

A student made a list of activities that involve energy.  
-
Sharks chasing a school of fish
A toaster heating bread
A cell phone charging
A tree limb falling to the ground
Tomato plants absorbing sunlight
A canoe floating down a river
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Which activities on the list are examples of the use of mechanical energy? 

• Activities 1, 4, and 6 

• Activities 2, 4, and 5

• Activities 1 and 2 

• Activities 3, 5, and 6