The scientific method and metric system

The steps of the scientific method are to:

1. Ask a question (Problem)

2. Constructor hypothesis

3. Test your hypothesis by doing an experiment

4. analyze your data

5. Make a conclusion

6. Repeat the experiment

Observations

Are an important part of doing an experiment. When you observe, you become aware of something using one of your senses. Your five senses are smell, taste, slight, touch and sound. In an observation you simply describe something as it appears. An observation is A statement describing a fact.

Inferences

Are different than observations it should not be included when observing an experiment. When you infer, you make a mental judgment based on observations. Inferences cannot be directly observed. They require thought.

The metric system

It is a standard measurement system used by most scientists all over the world

Overview of the metric system

* The metric system is based on multiples of 10

• The metric system is used to measure length, volume and mass

• The meter is the basic unit of length

• The Kilogram is the basic unit of mass

• The leader is the basic unit of volume

What is used to measure length

the ruler or meter stick

• There are 100 centimeters (cm) In one meter (m)

• There are 10 millimeters (mm) in one centimeter (cm)

examples using picture

1. If you measure a line to be 34cm it can also be expressed as 340 MM

2. If you measure a line to be 1.2 METERS it can also be expressed as 120cm

What is volume

The amount of space an object takes up.

• L x W x H Is the formula used to find the volume of a rectangle or square

• cm3 Is the unit used to express the volume of a rectangular square

What is the granulated cylinder used for?

It is used to measure the volume of a liquid

• ml Is the unit used to express the volume of a liquid

• You read the granulated cylinder at the bottom of the meniscus, a curve shaped line that appears in a granulated cylinder

What is mass

How much matter is in an object

• The triple beam balance is used to measure the mass of an object

• grams (g) Are used to express the mass of an object

What is density

The measurement of how much matter is contained in a given volume

• To determine density you need two things. The mass of Of an object and the volume of an object.

• the formula for density is D=M/V

• The units that are used to express density are g/cm3.

• If you cut an object in half it does not change its density

• The density of water is 1.0 g/cm 3

Use picture

The block in the picture has a density of 0.8 g/cm3. 80% of the block is below the water line and 20% is above it.

• Any Object above 1.0 g/cm3 We'll sink in water