8th Grade Showdown

Has Numbers?

100

How many total molecules in 2H₂SO₄

2

200

The number of elements in NaHCO₃

4

300

Total number of atoms in Al₂(SO₄)₂

12

400

Unicellular

1 cell

500

If a box is moving 10N to the left and is also pushed 10N to the right, what is the total net force?

0 Balanced forces

Chemical Stuff

100

Water boiling is what type of change?

Physical

200

The left side of the arrow in a chemical equation. 

Reactant

300

The least reactive group on the periodic table

Group 18

400

Why must a chemical equation be balanced?

Law of Conservation of Matter and Energy- cannot be created or destroyed. 

500

Shiny and conducts some electricity

Metalloid

Living Earth

100

Autotrophs

Plants (Producers)

200

The products of Photosynthesis

Glucose and Oxygen

300

The organ system that transports materials through the body.

Circulatory System

400

Is made up of layers of cells?

Tissues

500

Holds structures and substances in place in the cell 

Cytoplasm

The Moon

100

Zero light is visible

New Moon

200

Moon, sun and Earth are in a straight line, water is at the highest and lowest points. 

Spring Tide

300

How long the 100% full moon lasts. 

1 day

400

The type of tide that happens during the 1st and 3rd quarter. 

Neap Tide

500

Why the moon is constantly getting hit by craters?

It has little to no atmosphere

Ortiz's Randomness

100

The most reactive group on the periodic table

Group 1

200

Is melting butter a physical or chemical change?

Physical Change

300

How many elements are found in Cl₃CO₂

3

400

Stores wastes and water in the cell

Vacuole

500

When calculating velocity, what 2 things have to be present?

Speed and direction.