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Natural sciences

Reactions that occur between different kinds of matter: acids and bases

Educator section

Memorandum

Assignment 10:

Use the control list as basis for assessment.

Supplementary reading for Activity Research Assignment.

Leaner section

Content

Activity: to find out about acid rain [lo 1.1, lo 1.2, lo 1.3, lo 3.2]

ASSIGNMENT 10

“Burning coal releases sulphur dioxide which causes rain to fall as acid rain. This disturbs the chemical balance of the soil and prevents plants from growing properly”.

Do research on the formation of acid rain and the effect that it has on the environment. The following scientific process has to be followed for this investigative research project. Steps 1 – 7 must form part of the investigation. Step 7 involves preparing a report to be submitted to a policy-making body like the government, for instance.

FOCUS and planning of projects Collecting and processing of DATA DATA analysis Communication of findings
1.Statement of the problem that will be investigated. The purpose/outcome of the project is to solve the problem. 3.Collecting DATA on the subject, e.g. by using the internet, libraries, interviews, questionnaires, etc. 5.Obtaining results. These have to be recorded, analysed and evaluated. It will determine future planning or a repeat of the process. 7.Reporting. This can be done in various ways, e.g. by means of a written document.
2.Formulating a hypothesis*. This makes it possible to predict a possible solution. It can be shown as correct or incorrect. 4.Using data and investigation by means of experimentation, observation, etc. 6.Deduction. This is where the hypothesis is shown to be correct or wrong.

*Hypothesis: Preliminary statement that still has to be proven.

RESEARCH

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Questions & Answers

write 150 organic compounds and name it and draw the structure
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the study of the heat energy which is associated with chemical reactions
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explain please
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First twenty elements with their valences
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first twenty element with their valence
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Read Chapter 6, section 5
Dr
Read Chapter 6, section 5
Kareem
Atomic radius is the radius of the atom and is also called the orbital radius
Kareem
atomic radius is the distance between the nucleus of an atom and its valence shell
Amos
Read Chapter 6, section 5
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Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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