Tuesday
July 22, 2014

Homework Help: Science help,Anyone?

Posted by Princess Anna on Tuesday, December 10, 2013 at 4:52pm.

1. Why is it rare for the soft parts of an organism to become a fossil?

The soft parts take a long time to decay.
The soft parts can be eaten by other animals.
The soft parts cannot be buried in sediment.
The soft parts form petrified fossils.

2. Which of the following terms refers to a solid copy of the shape of an organism?
mold
cast
carbon film
trace fossil

3. Which of the following is an accurate definition of relative age?

a rock’s age as compared to the ages of other rocks
the number of years since the rock formed
a rock’s age based on how much carbon-14 it contains
the number of fossils a rock contains

4.
Geologists use radioactive dating for which of the following?

identifying the relative ages of rock layers
determining the absolute ages of rocks
telling how radioactive a substance is
collecting evidence of fossils

5. Which of the following units are in order from smallest to largest?
epoch, period, era
era, epoch, period
period, era, epoch
epoch, era, period

6. Earth’s first atmosphere was composed of mainly which of the following gases?

hydrogen and helium
carbon dioxide and oxygen
nitrogen and oxygen
carbon monoxide and ozone

My Answers:
1. A?
2. B
3.B
4.?
5.D
6.C

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