2.1
Which of the following is correct about the parts of an atom?
a) protons are found around the nucleus, and the nucleus is negative
b) neutrons are found around the nucleus, and the nucleus is positive
c) electrons are found around the nucleus, and the nucleus is positive
d) neutrons and electrons are both found in the nucleus
c) electrons are found around the nucleus, and the nucleus is positive
What is digestion?
a) an organism producing its own food
b) the breakdown of food into smaller substances the body can use
c) the movement of chemicals inside an organism's body
d) the process of releasing waste from the body
b) the breakdown of food into smaller substances the body can use
Which of the following is NOT one of the five basic needs of living things?
a) energy
b) proper temperature
c) reproduction
d) living space
c) reproduction
All living things need these 5 basic needs to survive:
1. Energy
2. Food and water
3. Living space
4. Proper temperature
5. Air
Why do living things need proper temperature to survive?
a) it helps their body processes and chemical reactions work correctly
b) it controls how many atoms are in their cells
c) it changes the color of their skin or fur
a) it helps their body processes and chemical reactions work correctly
In a chemical formula, what does the coefficient tell us?
a) how many electrons the molecule has
b) how many molecules of that substance are present
c) how many elements make up the molecule
d) how many protons are in the nucleus
b) how many molecules of that substance are present
In 3H₂O
Coefficient is the big number in front of the chemical formula.
3 = coefficient → tells us number of molecules present
Which of the options below can also stands for molecule?
a) subatomic particle
b) element
c) Protons
d) compound
d) compound
Which process in metabolism involves taking food into the body?
a) digestion
b) ingestion
c) excretion
d) respiration
b) ingestion
Which of these animals is warm-blooded?
a) snake
b) lizard
c) dog
d) turtle
c) dog
During photosynthesis, plants use sunlight to combine carbon dioxide and water to produce which two molecules?
a) oxygen and sugar
b) glucose and oxygen
c) sugar and carbon dioxide
d) oxygen and nitrogen
a) oxygen and sugar
Which particle in an atom has a positive charge?
a) electron
b) neutron
c) proton
d) nucleus (as a whole particle)
c) proton
How many atoms of oxygen (O) are in 3 H2O?
a) 1
b) 2
c) 3
d) 6
C) 3
What is excretion?
a) taking food into the body
b) breaking food down into nutrients
c) removing waste products from the body
d) using energy to grow
c) removing waste products from the body
Two organisms competing for the same living is an example of competition.
a) True
b) False
a) True
Which statement best explains why competition happens between organisms?
a) organisms compete when they need the same limited resource, like food or space
b) organisms compete only when they are the same species
c) competition only happens between plants
d) competition happens when organisms live in different habitats
a) organisms compete when they need the same limited resource, like food or space
Which of the following is an example of a response to a stimulus?
a) feeling hungry before lunch
b) jumping when you hear a loud noise
c) smelling flowers in a garden
d) seeing a bright light in the room
b) jumping when you hear a loud noise
How many atoms of carbon (C), hydrogen (H), and oxygen (O) are in 2 C6H12O6?
a) 6 C, 12 H, 6 O
b) 12 C, 12 H, 6 O
c) 12 C, 24 H, 12 O
d) 24 C, 24 H, 12 O
c) 12 C, 24 H, 12 O
Which of the following is an example of sexual reproduction?
a) a male and female bird producing chicks
b) a starfish regrowing a new organism from a broken arm
c) a bee and a flower exchanging pollen
d) a cell dividing into two cells
a) a male and female bird producing chicks
What is the primary source of energy that plants use to make their own food?
a) soil
b) water
c) the sun
d) carbon dioxide
c) the sun
The sun is the ultimate source of all energy on Earth.
Which statement correctly describes gas exchange in animals and plants?
a) Animals breathe in carbon dioxide (CO2) and out oxygen (O2); plants take in carbon dioxide (CO2) and release oxygen (O2)
b) Animals breathe in oxygen (O2) and out carbon dioxide (CO2); plants take in oxygen (O2) and release carbon dioxide (CO2)
c) Animals breathe in oxygen (O2) and out carbon dioxide (CO2); plants take in carbon dioxide (CO2) and release oxygen (O2)
d) Animals breathe in carbon dioxide (CO2) and out oxygen (O2); plants take in oxygen (O2) and release carbon dioxide (CO2)
c) Animals breathe in oxygen (O2) and out carbon dioxide (CO2); plants take in carbon dioxide (CO2) and release oxygen (O2)
What is the ultimate source of energy on Earth? Explain it.
It's the sun.
• Plants receive energy from sunlight. They use this energy to make their own food.
• Then animals can get energy by eating plants or by eating other animals.
The energy may move through different organisms, but it originally comes from the Sun.
☀️ ➡️🌱 ➡️ 🐰➡️ 🐅
Out of the Options below which one is part of John Dalton's Atomic theory?
a) Atoms of all elements are exactly alike
b) Atoms are made of protons, neutrons, and electrons
c) Atoms of the same element are exactly alike.
d) Only some types of matter are made of atoms.
E) All matter is made of a single type of atom
c) Atoms of the same element are exactly alike.
In the early 1800s, John Dalton, an English scientists, developed a more scientific explanation of atoms:
1. All matter is made of very small particles called atoms.
2. An atom was the smallest part of an element
3. Different elements have different atoms.( Carbon→ C. Oxygen → O)
4. Atoms can combine to make new substances( H2O )
5. Some atoms can mix in different amounts to make completely different substances.
N₂O = laughing gas
NO2 = smog gas
Which process in metabolism involves taking food into the body?
a) digestion
b) ingestion
c) excretion
d) respiration
b) ingestion
What term describes organisms that cannot keep a stable internal body temperature?
a) warm-blooded
b) homeothermic
c) cold-blooded
d) exothermic
c) cold-blooded
What are the five basic needs of all living things?
1. Energy
2. Food and water
3. Living space
4. Proper temperature
5. Air
Out of the Options below which one is part of John Dalton's Atomic theory?
a) Atoms of all elements are exactly alike
b) Atoms are made of protons, neutrons, and electrons
c) Only some types of matter are made of atoms.
d) Atoms of the same element are exactly alike.
E) All matter is made of a single type of atom
d) Atoms of the same element are exactly alike.
In the early 1800s, John Dalton, an English scientists, developed a more scientific explanation of atoms:
1. All matter is made of very small particles called atoms.
2. An atom was the smallest part of an element
3. Different elements have different atoms.( Carbon→ C. Oxygen → O)
4. Atoms can combine to make new substances( H2O )
5. Some atoms can mix in different amounts to make completely different substances.
N₂O = laughing gas
NO2 = smog gas