Check out the review of the answer keys for the Science ( Natural Science ) 10th grade questions at SMA MA, the Independent Curriculum Activity 4.1, with material on the characteristics of chemical reactions on page 78 .
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| Kunci Jawaban Soal IPA Kelas 10 SMA |
The results of data collection activities from events that have been observed or news that have been read or watched which discuss the topic of chemical reactions .
The description here is only intended for student assistants or teaching teachers. Aims to make it easier for student assistants and teaching teachers to assist students in completing the tasks on page 78 .
It is expected that students try to answer independently without looking at the answer reviews here. This familiarizes students to think independently in completing a task or solving a problem.
In activity 4.1 which discusses the characteristics of these chemical reactions , students are asked to first collect data related to activities or events surrounding chemical reactions from news or events around.
Then, students are asked to compare the facts with what is written from the source of information in the provided column (explanation here in paragraph form).
At the end, students are asked to make a conclusion regarding the characteristics of the chemical reactions that have been obtained. Here is a description of the answer. Listen carefully and carefully.
Activity 4.1
Chemical Reaction Characteristics
- Collect data related to activities/events that have been observed/news that have been read/seen on each of the following chemical reaction topics .
- Compare facts and what is written from information sources. Write in the column provided.
- Give a conclusion about the characteristics of the chemical reaction you get.
1) Combustion Reaction
Answer :
Activities that have been carried out/events/news that have been observed related to this reaction:
>> Fireworks
Observation result :
>> Fireworks are made of phosphor which is reactive when it meets oxygen gas and produces heat and bright light.
2) Rusting Reaction
Answer :
Activities that have been carried out/events/news that have been observed related to this reaction:
>> Iron is exposed to water and air constantly
Observation result :
>> Iron when exposed to water and air continuously containing oxygen gas will form a reddish layer on the surface of the iron and that is what is called the rust reaction.
3) Fermentation Reaction
Answer :
Activities that have been carried out/events/news that have been observed related to this reaction:
>> The rest of the fruit skin in the rice washing water and a little sugar is put into the jar
Observation result :
>> The rest of the skin of the fruit in the rice washing water and given a little sugar is put in a jar for a few days until bubbles appear that is the anaerobic fermentation reaction.
4) Precipitation Reaction
Answer :
Activities that have been carried out/events/news that have been observed related to this reaction:
>> Water-soaked whiting and baking soda powder
Observation result :
>> Betel lime soaked in water and a powder of baking soda will form a white precipitate.
5) Decay Reaction
Answer :
Activities that have been carried out/events/news that have been observed related to this reaction:
>> Organic waste overgrown with desulfovibria bacteria
Observation result :
>> Organic waste overgrown with desulfovibria bacteria will eventually produce foul-smelling gas.
6) Conclusion
Answer :
1) The combustion reaction produces changes in heat and light.
2) The rusting reaction produces a color change.
3) The fermentation reaction produces gas formation.
4) The precipitation reaction results in the formation of a precipitate.
5) The decomposition reaction results in the formation of gas.
Disclaimer: Any differences in answers with the teacher or student assistant, will be returned to the policies of the respective teacher and student assistant. This review is for reference only. Not an absolute benchmark for the most correct answer.
This is a review related to the answer key to the ( Natural Science ) 10th grade IPA Activity 4.1 program question for the Independent Curriculum with the material Characteristics of Chemical Reactions page 78 . That's it. May be useful.