Science CFA 2.1 Review

Students are conducting an investigation to determine the amount of force needed to move a 10 kg mass. Their teacher instructed them to conduct the investigation 3 times and record their data with each trial. Why would the teacher want the students to do the investigation more than one time?

• To help them understand their results

• To increase the reliability of their results

• So they could practice their procedure

• Class time was too long to only do the investigation once

Electricity in a circuit is most like which of the following?

• Water in pipes

• Vehicle on a road

• Leaves on a tree

• Water in a ocean

Which scientists is best known for working with electrical current?

• Nikola Tesla

• George Washington

• James Hutton

• Albert Einstein

Tags

NGSS.HS-PS2-5

A student filled four different bowls with 10 ice cubes in each. Each bowl was the same size and shape. The student timed how long it took all the ice cubes in each bowl to melt. The results are shown below.

Based on these data, the student can conclude?

• The metal bowl is the best conductor

• The clay bowl is the hardest bowl

• The glass bowl is easiest to break

• The plastic bowl is the most flexible

Tags

NGSS.MS-PS3-4

Students use the circuit pictured to test different objects.

The students connect wire ends A and B to four objects to see if the light comes on. Metal is a better conductor so which two items below would light the circuit.

• Magnet

• Nail

• Wooden Toothpick

• Wooden Spoon

Tags

NGSS.MS-PS1-1

Which of the light bulbs would light up in the diagrams below?

• A

• B

• C

• D

Most household appliances, such as toasters and blenders, must be plugged into a socket to work. Which type of energy provides power for these appliances?

• light

• sound

• electrical

• mechanical

A farmer measured the amount of crops produced and the number of hectares that he used over the course of 11 years.

What year had the lowest yield (bales/hectare)?

• 2003

• 2001

• 2011

• 2009

Tags

NGSS.MS-LS2-1

We should as a scientist conduct multiple trials to increase the reliability of our results?

• True

• False

• It does not matter how many times we conduct trials

• None of the answers

Tags

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4

Which scientist, known as one of America's greatest inventors, created the electric light bulb?

• George Washington Carver

• Nikola Tesla

• Thomas Edison

• Albert Einstein