EOG Science

Is hammering wood together to build a house a chemical or physical change?

• chemical

• physical

Is melting butter for popcorn a chemical or physical change?

• chemical

• physical

Tags

NGSS.5-PS1-4

Is bleaching your hair a physical or chemical change?

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Why is it harder for the boy in Image B to get down the hill?

• Motion

• Friction

• Work

• Displacement

If these boys are pulling with the same amount of force.  What will happen?

• The boy in blue will win.

• They will not move at all.

• The boy in red will win.

• Both will fall down.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

When alleles are different (ex: Yy)

• heterozygous

• dominant

• homozygous

the genetic code for the gene (YY, Yy, yy)

• phenotype

• genotype

• allele

In the current model of the Periodic Table of Elements, the elements have been placed in groups or families. Why have the elements been organized in such a way?

• Elements in each group have similar densities.

• Elements in each group all have similar boiling points.

• Elements in each group have similar physical and chemical properties.

• Elements in each group have the ability to chemically react with the other elements within that group.

A science teacher mixes calcium chloride and vinegar in a test tube. He passes the test tube around for his students to feel. The students notice that the test tube is hot. The science teacher asks the students to decide if the mixing of the two chemicals involved a physical or chemical change. He also asks the students to justify their answer. Which student gave the correct response?

• Student 1: The change was physical because a temperature change occurred.

• Student 2. The change was chemical because a temperature change occurred.

• Student 3: The change was physical because the two chemicals mixed.

• Student 4: The change was chemical because the two chemicals mixed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How would excessive increases in nitrate and phosphorus concentration affect freshwater systems?

• It would cause excessive algal blooms.

• It would cause increased dissolved oxygen.

• It would cause increased water clarity.

• It would cause extremely cold water.

Tags

NGSS.MS-LS2-4