Formative assessment for Unit 1(Chemistry) MYP 5

What do you understand by "the scientific method"?

Answer explanation

The scientific method is a collection of approaches to experimentation, designed to increase our knowledge and understanding of scientific concepts, and enable us to test the validity of our conclusions.

1.Formation of hypothesis

2.Perform an experiment

3. 3. Record and retain all your data

4. 4.Design experiment to test hypothesis

5. 5.Observation (qualitative and quantitative)

6. 6. Analysis of evidence to determine the support or disproval of hypothesis

• Record and retain all your data

• Observation(Qualitative and Quantitative)

• Design experiment to test hypothesis

• Perform experiment

• Formation of hypothesis

Identify the qualitative observation

• The beaker contains a clear and colorless liquid

• The beaker contains 22ml of liquid

• The beaker is filled with a clear and colorless liquid of 22ml

Identify the quantitative observation

• The beaker contains 22ml of liquid

• The beaker is filled with a clear and colorless liquid

• The beaker is filled with a clear and colorless liquid of 22ml

Alex had a frown on his face ans was dragging his feet as he walked, give an inference from this statement

Answer explanation

You can infer that he is having a bad day or he is sad or he was thinking about something terrible that had happened to him today.

Kim's baby made a disgusted face after trying a new food. Give an inference from this statement

Answer explanation

The baby does not like the new food

Why do metals tend to lose electrons to form ions?

• Due to their atomic structure

• Relatively small number of electrons in their outermost energy level, or valence shell.

• Their outer electrons are loosely bounded on them and they lose electrons

• To achieve a full outer shell

• To form negative ions

Answer explanation

This is primarily due to their atomic structure. Metals have a relatively small number of electrons in their outermost energy level, or valence shell. These electrons are relatively far from the nucleus and are not strongly attracted to it, making them relatively easy to remove.

In the reaction of sodium with ordinary air(in a moist atmosphere), Hydroxides, carbonates and oxides are formed. Can you state in what order these are formed?

• Oxides

• Hydroxides

• Carbonates

Answer explanation

Burning of Sodium in extra oxygen

Answer explanation

Burning of sodium in air/oxygen