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December 2025

42,840 public questions were asked this month.

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Recent questions

Latest from December 2025

Which of the following is lacking in invertebrates?(1 point) Responses a spinal column a spinal column digestive system digestive system eyes eyes muscular system muscular system
Asked by l 1 answer
The rock in the picture is rhyolite, an extrusive igneous rock. Based on its appearance, how would you classify this rock? Question 20 options: A) Intermediate B) Mafic C) Felsic D) Ultramafic
Asked by idk 1 answer
Which mineral group is composed of compounds that contain atoms of sulfur and one or more metals? Question 19 options: A) Sulfates B) Phosphates C) Silicates D) Sulfides
Asked by idk 1 answer
Which statement accurately describes the relationship between mass and weight? Question 18 options: A) An object with twice the mass of another object will weigh one-fourth as much. B) An object with twice the mass of an...
Asked by idk 1 answer
Most structures in a cell are membrane-bound, but some are not. Which structure lacking a membrane is present in plant cells and not in animal cells?(1 point) Responses mitochondrion mitochondrion chloroplast chloroplast...
Asked by l 1 answer
Your classmate Emily is giving a presentation about medieval art. She mentions the Bayeux Tapestry. What does she mention that is NOT correct about this piece of artwork? (1 point) Responses It is an embroidered cloth th...
Asked by a 1 answer
Which food or drink item is a homogeneous mixture? Question 17 options: A) A cup of black coffee B) A tossed salad C) A handful of trail mix D) A bowl of cereal with milk
Asked by idk 1 answer
What is a distinguishing feature between smooth endoplasmic reticulum and rough endoplasmic reticulum?(1 point) Responses Smooth endoplasmic reticulum has lysosomes attached to its surface. Smooth endoplasmic reticulum h...
Asked by l 1 answer
Claystone and shale are examples of Question 16 options: A) conglomerate. B) breccia. C) sandstone. D) mudrock.
Asked by idk 1 answer
What is the movement of water, containing no solute, across semi-permeable cellular membranes through proteins called aquaporins known?(1 point) Responses simple diffusion simple diffusion endocytosis endocytosis osmosis...
Asked by l 1 answer
To which mineral group do most of the rocks in Earth's crust belong? Question 15 options: A) Phosphates B) Native elements C) Carbonates D) Silicates
Asked by idk 1 answer
All of the following are factors that affect metamorphic processes except Question 14 options: A) deposition of new layers of sediment. B) temperature. C) pressure. D) mineral composition of the parent rock.
Asked by idk 1 answer
Which scientist began organizing elements into the periodic table? Question 13 options: A) Sir Isaac Newton B) Sir Francis Bacon C) Alfred Wegener D) Dmitri Mendeleev
Asked by idk 1 answer
In general, which step of the scientific method generally follows forming a hypothesis? Question 12 options: A) Designing an experiment B) Making an observation C) Identifying variables D) Stating a problem
Asked by idk 1 answer
What happens to an atom of sulfur (S) if it loses an electron? Question 11 options: A) It becomes an anion. B) It becomes a molecule. C) It becomes inert. D) It becomes a cation.
Asked by idk 1 answer
Which geological principle accounts for the tilting of the layers in the sedimentary rock shown in the image? Question 10 options: A) Principle of faunal succession B) Principle of inclusions C) Principle of superpositio...
Asked by idk 1 answer
Which element in magma is most abundant? Question 9 options: A) Aluminum B) Iron C) Oxygen D) Silicon
Asked by idk 1 answer
Which of the following is the building block of silicate minerals? Question 8 options: A) Silica chain B) Silica dodecahedron C) Silica ring D) Silica tetrahedron
Asked by idk 1 answer
Which characteristic of minerals may be described using words such as bladed, fibrous, platy, or dendritic? Question 7 options: A) Crystal habit B) Lattice framework C) Streak D) Luster
Asked by idk 1 answer
A geologist is collecting data from a sample of rock. Which of the following is an example of qualitative, rather than quantitative, data? Question 6 options: A) The percentages of various minerals in the rock B) A descr...
Asked by idk 1 answer
The image shows the mineral kaolinite. Which of the following best describes the luster of this mineral? Question 5 options: A) Metallic B) Nonmetallic glassy C) Nonmetallic pearly D) Nonmetallic dull
Asked by idk 1 answer
Where is Earth's oldest known rock located? Question 4 options: A) The eastern shore of Hudson Bay in Canada B) The Jack Hills region of Australia C) The floor of the Pacific Ocean D) Yosemite National Park in the United...
Asked by idk 1 answer
Which of the following describes chemical weathering? Question 3 options: A) The removal of overlying material decreases pressure on an underlying rock. B) Salt crystals grow in the cracks and pores of a rock. C) Acid ra...
Asked by idk 1 answer
What's a pluton? Question 2 options: A) A body of igneous rock that forms from cooling lava on Earth's surface B) A body of igneous rock that forms within Earth's crust C) A body of igneous rock that form as a result of...
Asked by idk 1 answer
How are mafic minerals different from felsic minerals? Question 1 options: A) Mafic minerals contain more light-colored, low-density minerals. B) Mafic minerals contain higher levels of feldspar and quartz. C) Mafic mine...
Asked by idk 1 answer