Work Sheet for Grade 7

3. Common observations of a chemical reaction are described in the introduction section. For each observation, name a common or everyday occurrence that must involve a chemical reaction?

1. Fill in the table below with the results from the monosaccharide test experiment, and your conclusions based on those results.

Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic, acidic, or remain neutral when mixed with other chemicals.

2. Four unknown samples were included in the lab kit: flax seed meal, potato starch, egg whites, and dried milk. Using the results of the biochemical testing, determine which number corresponds to the correct unknown. (8 points)

In Mark 2:1-12, the story of healing of a paralytic man is told. Jesus heals this man in front of so-called non-believers in His power. In fact, when He poses the question that “Why are you thinking these things? Which is easier: to say to this paralyzed man, ‘Your sins are forgiven,’ or to say, ‘Get up, take your mat and walk’? (Mark 2:1-12) There are symbolic reflections of this rhetorical question. On the one hand, Jesus justifies that it is preferable to forgive the sins to heal someone directly. He conveys the message that being the Son of Man, he has the authority and ministry to ‘forgive’ the sins of that paralytic man, however, instead of approaching the healing or the removal of physical ailment, he deals with the matter impressively because he has to give a message to the non-believers in God’s power. He clearly mentions that men have the power to forgive because this ability is God’s virtue. Man is the live reflection of God and thus, he can perform the act of forgiveness and become great in life. The important aspect of this story is to show before the people that Jesus has been born with an authority to heal, cure or forgive people and thus, he is passing the message of God to the entire humankind.

B 5. B 6. A 7. B 8. B 9.

Which solution has a pH closest to neutral? (Stomach acid; blood; lemon juice; soap, household bleach)

3. You test another new unknown bacterial sample, and find the G+C content is identical to one of the samples you have already identified, but the rRNA gene sequence contains one base that is different. What can you conclude: C.

1. ___L__ Bill perceived the cover of his book was red even though the light changed in the various rooms in which he read the book.

7. Click in the Stockroom. Double-click on the bottles of NH3 and H2SO4 to move them from the shelf to the counter and return to the laboratory. Drag the bottle of NH3 to one of the three spotlights on the

C.|NH3 + BTB|A4|The mixture is a lighter royal blue under white paper and a darker royal blue under black paper. The mustard yellow would be an acidic indicator and the royal blue a basic indicator. |

2.List whether each of the following substances was positive or negative for reducing sugar, as indicated by the Benedict's test. (6 points)

Most household cleaning products work by using enzymes. In my house, I found laundry detergent, dishwashing soap, and the soap itself. The

The goal of the experiment was to identify Unknown 33A and 33B. Unknown 33A was a white, crystalline solid that had a sweet cherry smell and Unknown 33B was a beige, yellowish color liquid that was translucent and had a viscosity similar to water. Also, the liquid was homogenous and smelled sour, similar to mildew.

I predict that out of the 20 solutions that we are going to be testing, about 6 of them will be an acid, 3 will be neutral and 11 will be a base.