Reading Questions Page 31, 32, And 59

Ledgerwood Period D Chem 1H

Eamon Barkhordarian 8/29/09

Homework #4 Reading Questions pg. 31, 32, and 59 I. Page 31 1.

Scientific Method- Logical approach to solving problems by

observing and collecting data, formulating hypothesis testing hypothesis, and formulating theories that are supported by data. 2.

Which of the following are quantitative? – the liquid has a

temperature of 55.6 Celsius 3.

How do hypothesis and theories differ? a. A hypothesis is also known as a testable statement. It serves as a basis for making predictions and for carrying out further experiments. A theory is a broad generalization that explains a body of facts or phenomenon.

4.

How are models related to theories and hypothesis? a. If a hypothesis is successfully predicted it can be shown in a model, and if that model successfully explains the phenomenon it can be turned into a theory.

5.

I would write a hypothesis first. During testing, the experimental

conditions that remain constant are called controls, and any other condition that changes is called a variable. If the testing showed the hypothesis was not correct, it would be discarded or modified. \ II.

III.

Page 32 1.

Lighting a fire under a penny. Rust on metal.

2.

Brittle failure occurs when a plate is dropped and breaks.

Page 59 3. a. A model is a visual, verbal, or mathematical way of describing a successful hypothesis.

Ledgerwood Period D Chem 1H

Eamon Barkhordarian 8/29/09 b. A model is a visual, verbal, or mathematical way of describing a successful hypothesis. A theory is a hypothesis that becomes a theory if the model can explain the phenomenon successfully.