Question

A piece of iron at 25 °C is dropped into a glass of water at 15 °C. Which statement is correct?

Heat will flow from the iron to the water in the glass until both reach the same temperature.
Heat will flow from the water in the glass to the iron until both reach the same temperature.
The final temperature of the water in the glass and the iron will be 25 °C.
The final temperature of the water in the glass and the iron will be 15 °C.

Question 4(Multiple Choice Worth 4 points)

(05.01 LC)

What best describes red light?

Is a form of infrared light
Is a form of ultraviolet light
Has the longest wavelength
Has the shortest wavelength

Question 5(Multiple Choice Worth 4 points)

(05.04 HC)

It has been reported that the DNA of the elephant shark has barely changed over the last 420 million years. Which statement explains why the elephant shark has not changed over time?

Many variations existed in the species.
Several mutations took place in the species.
Their environment remained fairly constant over time.
They were exposed to severe competition for food and a mate.

Question 6(Multiple Choice Worth 4 points)

(05.03 LC)

What most likely happens when water vapor cools?

It changes into gas.
It changes into liquid.
Its temperature increases.
Its temperature remains constant.

Question 7(Multiple Choice Worth 4 points)

(05.04 MC)

Polar bears give birth and hunt on sea ice. Which of the following would help polar bears survive during the melting of Arctic ice?

Growing another layer of fur during summer
Searching for novel food sources
Migrating inland during summer
Sticking to the usual diet of seals

Question 8(Multiple Choice Worth 4 points)

(05.04 MC)

The table below shows the maximum depth up to which some shallow water coral species can establish their colonies.

Depth of Colonies
Species Maximum Depth
W 44 m
X 39 m
Y 48 m
Z 31 m

Which coral species is most likely to die out when the surface ocean temperature rises?
W
X
Y
Z

Question 9(Multiple Choice Worth 4 points)

(05.02 MC)

Look at the diagram below.

Ray 1 from the Sun moves through air and falls on the surface of a lake. Ray 2 is a ray which travels from the surface of the lake at the point Ray 1 strikes the lake, and moves towards air. Ray 1 and Ray 2 make the same angle with the surface of the lake. Ray 1 bends towards the vertical when it enters the lake as Ray 3

Which statement is correct about Ray 3?

Ray 3 is the part of Ray 1 which is reflected.
Ray