حل أوراق عمل Exploring Life العلوم المتكاملة الصف السادس
حل أوراق عمل Exploring Life العلوم المتكاملة الصف السادس
Answer Key with Questions
Lesson Check: Exploring Life
1) _____. The smallest unit of life is the
A) cell
B) homeostasis
C) organism
D) protein
Correct Answer
A) cell
2) Which of the following is NOT a necessary characteristic of a living thing?
A) It is made up of cells.
B) It eats food to get energy.
C) It grows and develops.
D) It responds to stimuli.
Correct Answer
B) It eats food to get energy.
Answer Key with Questions
Lesson Check: Exploring Life
3) Which of the following is a multicellular organism?
A) bacterium
B) amoeba
C) mouse
D) paramecium
Correct Answer
C) mouse
4) Which statement is true?
A) Cells come in different shapes, but are all about the same size—very, very small.
B) Cells come in different shapes and sizes.
C) Cells all have the same shape, but come in different sizes.
D) Cells are all the same shape and size—small and rounded.
Correct Answer
B) Cells come in different shapes and sizes.
Answer Key with Questions
Lesson Check: Exploring Life
5) Animals are multicellular.
True
False
Correct Answer
True
6) cells have genetic material that is not surrounded by a lining………………..
Correct Answer
Prokaryotic
7) The cell theory is the result of the hypothesis and observation of one person.
True
False
Correct Answer
Fals
Answer Key with Questions
Lesson Check: Exploring Life
8) The cell theory states that all cells come from cells that already exist.
True
False
Correct Answer
True
9) Which correctly describes a difference between prokaryotic and eukaryotic cells?
A) Only prokaryotic cells have vacuoles.
B) Eukaryotic cells are smaller than prokaryotic cells.
C) Prokaryotic cells have many organelles, each with their own specialized functions.
D) Only eukaryotic cells have their genetic material surrounded by a lining.
Correct Answer
D) Only eukaryotic cells have their genetic material surrounded by a lining.
Answer Key with Questions
Lesson Check: Exploring Life
10) A spore is a small structure, usually a single cell, produced by plants, fungi, and some microorganisms. In the right environment, a single spore can develop into a new, individual organism. During observations of soil samples, scientists find tiny structures that appear to be spores. Which experiment could the scientists use that would best determine if these tiny structures are spores?
A) Test them for chemicals normally found in living cells.
Rationale: Chemicals found in living cells, such as water or salt, might also be found in structures or conditions lacking life.
B) Place them in water and see if they change in shape or mass.
Rationale: Many nonliving things can change shape or mass when placed in water.
C) Observe whether they go through the steps of cell division to form new cells.
Rationale: Living cells come from existing cells.
D) Observe whether they are made of atoms by using a high-powered microscope.
Rationale: Nonliving things are also composed of atoms.
Correct Answer
C) Observe whether they go through the steps of cell division to form new cells.
Correct Answer
Answers may vary.
Explanation
Observations that Jade could make to provide evidence that an onion is made of cells include seeing:
- cell walls. The [rectangular] cell walls surround rows of units (box-like structures) [cells] that are attached to one another. [Onions are plants; so, their cells have a cell wall to provide structural support.]
- cell membranes. Thin membranes within the cell walls contain the cell organelles nuclei. Each cell has a nucleus that may be seen with a light microscope. [Some cells may have a nucleus that is in the process of mitosis and actively dividing.]
- cell division. Recognizing the different stages of cells dividing [mitosis] is evidence that an onion is made of cells
