A student wants to make an electromagnet. Which items are needed?

• battery, heat source, copper wire

• magnet, copper wire, metal nail

• copper wire, metal nail, battery

• magnet, battery, heat source

The force of gravity pulls down on Carol’s house with a total force of

300,000 newtons.

The force of gravity on Carol’s house would be exactly twice as much if the

house

• were twice as tall

• had twice as much mass

• had twice as much volume

• covered twice as much area

The sun’s mass is about 30 million times greater than the moon.

Why does the gravitational pull between Earth and the moon affect Earth’s tides more than the gravitational pull between Earth and the sun?

• The moon is more dense than the sun.

• The moon is closer to Earth than the sun.

• The moon has phases, but the sun does not.

• The moon orbits Earth, but the sun does not.

Which name goes with bird W?

• Certhidea

• Geospiza

• Camathynchus

• Platyspiza

Which represents the smallest part of an element that retains all the properties of that

element?

• molecule

• atom

• nucleus

• proton

Which expressions are equivalent to 4(9 + 3)?

• 4(12)

• 36 + 3

• 36 + 12

• 4 + (9+3)

• (9+3) + (9+3) + (9+3) + (9+3)

Select all that are TRUE.

• 3² < 4/9 + 2/3

• 2(2³ + 14 x 2) = 9 x 8

• 16.2 x 3 - 24.6 < 72/3 + 2.78

What value of coefficient "b" makes the equation true for any real number x ? -3 (2x-3) + 5x = bx + 9

• -6

• -1

• -21

• 7

Select all that are rational.

• 1.3333.....

• 5

• 2/5

• pi

• 2.5

Choose the response that matches the underlined word: Where did you find those colorful rocks?

• adjective

• adverb

• preposition

• verb