# Science For Grade 9 Trivia

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Daniel P, MSEd, Science |
Science Education
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With 11 years of urban teaching, Daniel excels as a STEM club teacher, demonstrating expertise in curriculum design, differentiated instruction for IEPs, and adept use of Google Classroom. His commitment to education shines through in his impactful contributions to STEM learning. Daniel holds a MSEd in Science Education from The City College of New York and a BA in History from Binghamton University. With certifications in Special Education and Biology, he is dedicated to curriculum development and enhancing educational experiences for students.
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Squishyfish123
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Quizzes Created: 1 | Total Attempts: 83,059
Questions: 10 | Viewed: 83,059

1.

### When is an atom considered stable?

Answer: When it has a full outer valence shell.
Explanation:
When an atom has a full outer orbit or valence shell, it means that all the spaces in the outermost energy level of the atom are filled with electrons. This is a stable configuration for an atom because it satisfies the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a full outer shell. When the outer orbit is full, the atom is less likely to react with other atoms and is considered to be chemically stable.
2.

### How many atoms are in Ca(NO3)2?

Explanation:
The correct answer is Ca-1 N-2 O-6. There is one calcium atom (Ca), two nitrogen atoms (N), and six oxygen atoms (O) in the compound Ca(NO3)2. The subscript numbers indicate the number of each type of atom present in the molecule. The number of nitrogen atoms and oxygen atoms inside the parentheses is multiplied by 2 due to the 2 outside the parentheses.
3.

### What does not necessarily indicate a chemical change has occurred?

Answer: When a smell is produced
Explanation:
The production of smell does not necessarily indicate a chemical change because it can also occur in physical changes. Smells can be produced when substances evaporate or when they are physically broken down, without any chemical reactions taking place. Therefore, the production of smell alone is not sufficient evidence to indicate a chemical change.
4.

### What is the equation for photosynthesis?

Explanation:
The equation for photosynthesis is H2O+CO2 (light+chlorophyll) = oxygen+glucose. This equation represents the process by which plants and some other organisms convert carbon dioxide and water into oxygen and glucose, using sunlight and chlorophyll as catalysts.
5.

### What does photosynthesis provide us with?

Explanation:
Photosynthesis provides us with oxygen and glucose.
Oxygen: During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) and convert them into glucose and oxygen. The oxygen is released into the atmosphere, which is essential for the survival of most organisms on Earth, including humans.
Glucose: The glucose produced by plants during photosynthesis is a source of energy for many organisms. Herbivores eat plants to get this energy, and carnivores eat herbivores, thus the energy from photosynthesis flows through the food chain.
While photosynthesis does require light and water as inputs, it does not provide these as outputs. Therefore, “light” and “water” are not correct answers. As for “energy”, while it’s true that the glucose produced in photosynthesis stores energy that can be used by other organisms, the process itself does   provide energy in a form that can be used by humans or animals.
6.

### ____________ is when toxins build up in a single organism.

Explanation:
Bioaccumulation is the process by which toxins gradually accumulate in the tissues of an individual organism over time. This occurs when the organism is exposed to these toxins through its environment or food sources, and is unable to eliminate them at the same rate they are being absorbed. As a result, the concentration of toxins in the organism's body increases, leading to potential harmful effects on its health.
7.

### A circumpolar constellation can be seen ____________

Explanation:
A circumpolar constellation can be seen all year round.  Circumpolar constellations are located near the celestial pole, either the North or South Pole, and appear to circle around it. As a result, they never dip below the horizon and are visible throughout the year. This is in contrast to other constellations that rise and set with the rotation of the Earth and may not be visible at certain times of the year.
8.

### When an atom gains an electron, it becomes an:

Explanation:
When an atom gains an electron, it becomes an anion. An anion is a negatively charged ion because it now has more electrons than protons. This results in an overall negative charge for the atom. A cation, on the other hand, is a positively charged ion formed when an atom loses an electron. "Onion" is not a term used in chemistry to describe the result of an atom gaining an electron.
9.

### Why would you get an electric shock from an object?

Explanation:
When you get an electric shock from an object, it is because electrons want to discharge. Electrons are negatively charged particles that can build up on an object. When you touch that object, the excess electrons will try to move to a lower charge or neutral object, such as your body. This movement of electrons causes a sudden flow of electric current through your body, resulting in a shock sensation.
10.