8th Science STAAR

Front

What are the characteristics that classify organisms as animals?

Back

Multicellular, eukaryotic, heterotrophic.

Front

How many beads are needed to model aluminum sulfate, Al2(SO4)3?

Back

2 blue, 3 yellow, and 12 green.

Front

What is a chemical change that occurs during digestion?

Back

The breakdown of molecules of food by enzymes and acid in the stomach.

Front

What do active volcanoes in the Caribbean Sea indicate about plate tectonics?

Back

The volcanoes form an island arc, indicating a converging plate boundary.

Front

What is the spectral class of Barnard's Star with a temperature of 2,800 K?

Back

Spectral Class M.

Front

Define 'eukaryotic'.

Back

Organisms whose cells have a nucleus enclosed within membranes.

Front

What is the difference between autotrophic and heterotrophic organisms?

Back

Autotrophic organisms produce their own food, while heterotrophic organisms consume other organisms for energy.

Front

What is the role of enzymes in digestion?

Back

Enzymes break down food molecules into smaller, absorbable units.

Front

What is a converging plate boundary?

Back

A tectonic boundary where two plates move towards each other, often causing volcanic activity.

Front

What is the significance of light-years in astronomy?

Back

A light-year is the distance that light travels in one year, used to measure astronomical distances.