7th Grade Science (Period 4) Assignments

All acellus and vocabulary must be turned in by the end of today, Monday, May 18,2020!!! iPads, hotspots, and materials are due back at school
on Tuesday.

Get your acellus and vocab done if you haven’t!

If done with all work you can just respond yes to this “question.”

Submit file back to me once finished with ALL lessons.

Instead of having a question, you just need to respond YES to this “question” to get the points. TUESDAY MAY 19,2020, is the last day to have ALL of your work in. Please make sure you get it all done and turned in. The iPads, hotspots, and everything you have from the school is to be turned in Tuesday. Y’all get all of your work turned in before then.

Q: Respond yes to this to receive points.

Placental mammals are any member of the mammalian group characterized by the presence of a placenta, which facilitates exchange of nutrients and wastes between the blood of the mother and that of the fetus. The placentals include all living mammals except marsupials and monotremes.

Q: Name and describe a placental mammal.

One reason frogs are often chosen to be dissected is that their bodies provide a good overview of the organ systems of a complex living thing. The organs present in a frog, and the way they are laid out in the body, are similar enough to humans to provide insight for students about how their bodies work.

Q: Which organ is removed first during a frog dissection?

A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys consist of a series of choices that lead the user to the correct name of a given item. "Dichotomous" means "divided into two parts".

Q: Make a dichotomous key with 3 questions and choices.

A mammal is a warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, the secretion of milk by females for the nourishment of the young, and (typically) the birth of live young.

Q: Name a mammal and what characteristics classify this animal as a mammal.

Submit this file back to me once you have completed the Acellus lessons listed.

Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of birds migrate. Migration carries high costs in predation and mortality, including hunting by humans, and is driven primarily by availability of food.

Q: Do all birds migrate? If your answer is no, name a species of birds that you believe do not migrate.

Scientists are still arguing whether birds are dinosaurs or not. Scientists have looked at the traits, skeletons, and behaviors and compared. Take a look at these websites and make a decision for yourself!

Websites:

https://www.smithsonianmag.com/science-nature/dinosaurs-living-descendants-69657706/

https://nhm.org/research-collections/departments/dinosaur-institute

https://www.earthmagazine.org/article/are-birds-dinosaurs-new-evidence-muddies-picture

Q: Do you think birds are dinosaurs? Why or why not?

Birds have feathers, wings, lay eggs and are warm blooded. There are around 10000 different species of birds worldwide. The Ostrich is the largest bird in the world. It also lays the largest eggs and has the fastest maximum running speed (97 kph).

Q: Tell me an interesting bird fact that is not mentioned above.

Birds are a group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.

Q: Name a specific type of bird and name some of its characteristics. (At least 3 characteristics)

Space discoveries are in the news on a nearly weekly basis – but they may not leave an impression as impactful as the legend of Star Wars. From Wookiees and Ewoks to lightsabers and droids, the Star Wars movies have captured the imaginations of generations of fans. With the release of the final installment of the Skywalker saga, "The Rise of Skywalker", questions abound about the fate of the inhabitants of that faraway galaxy. Beyond the plot, there are plenty of questions we can ask about the science: How did those planets form? Could they exist in our universe? Could Star Wars really happen?

Q: What do you think? Could those planets exist in our universe? Do you think something like Star Wars could really happen?

MAY THE FOURTH BE WITH YOU!

Look up the definition for each word. Once finished, make sure you submit the file.

Amphibians and reptiles are both different and alike.

Q: WOULD YOU RATHER be an amphibian or a reptile? Explain your answer.

This assignment is for extra credit, and you will have to watch "Finding Nemo" to answer the questions.

This is extra credit. The assignment consists of 8 matching questions with characters from Sponge-Bob Squarepants. Submit by Friday to receive the extra grade.

A reptile is a vertebrate animal of a class that includes snakes, lizards, crocodiles, turtles, and tortoises. They are distinguished by having a dry scaly skin and typically laying soft-shelled eggs on land.
Q: Can you name a reptile and describe its characteristics?

Amazing Amphibian Facts:
▪️The fastest amphibian is an Andean salamander, which can travel at speeds of 15 mph.
▪️The world's largest amphibian species is the aptly named Chinese giant salamander, at 1.8 meters long (that's about 5'9") and weighing around 110 pounds.
▪️The Paedophryne amauensis frog in Papua New Guinea claimed the title of "World's Smallest Frog," this species is the tiniest known vertebrate in existence. It is just 7.7 millimeters in length.
▪️Due to amphibians permeable skin and reliance on clean environmental conditions for reproduction, amphibians are viewed as crucial ecological indicators.

❓Q: What is another AMAZING/INTERESTING amphibian fact?

A reptile by definition is: a vertebrate animal of a class that includes snakes, lizards, crocodiles, turtles, and tortoises. They are distinguished by having a dry scaly skin and typically laying soft-shelled eggs on land.

Q: Name a specific reptile and explain why it is categorized as a reptile.

In general, frogs have protruding eyes, no tail, and strong, webbed hind feet that are adapted for leaping and swimming. They also possess smooth, moist skins. Many are predominantly aquatic, but some live on land, in burrows, or in trees. A number depart from the typical form. Sedge frogs, for example, are climbing African frogs with adhesive toe disks. The flying frogs are tree-dwelling, they can glide 40 to 50 feet by means of expanded webbing between the fingers and toes.

Q: Explain the life cycle of a frog.

Please answer the question by submitting your answer to me rather than commenting in the comment section.

Make sure you are doing the assigned acellus. You are welcome to work ahead, but it is not necessary.

Although jellyfish and crayfish have the word “fish” in their name, they aren’t actually fish.

Q: What is a jellyfish?

Q: What is a crayfish?

Some fish use camouflage to hide themselves in their surroundings.

Q: Can you think of any fish that are able to camouflage?

Q: Why do fish use this adaptation?

Today is Earth day! 🌍 Earth Day founder, Gaylord Nelson, came up with the idea for a national day to focus on the environment after he witnessed the ravages of a massive oil spill in Santa Barbara, CA, in 1969. Now it is celebrated nationwide on April 22 every year. The purpose of Earth Day is to raise awareness on the negative impacts our actions as mankind have on the environment and the earth as a whole. The goal of this national holiday is to demonstrate and receive support for environmental protection. Simple things such as turning off the lights to conserve energy, not leaving the water on while you brush your teeth, etc., are all ways to help protect the Earth. Can you think of ways to help protect the Earth?

Q: How does mankind negatively impact the environment?

Q: What are ways to protect the Earth?

Amphibians spend part of their lives in water and part on land. They are usually born with gills. As they get older, they grow legs and lungs, and live on land.

Q: Name an amphibian, then tell me about it’s features when it is born versus it’s features as an adult.

Answer the question and submit your response back to me. Do not make another post with your answer.

Fish spend their whole lives in water. They breathe by using gills and reproduce by laying eggs. Most are covered in scales and a slimy coating.

Q: How do gills work?
Q: What is the purpose of scales?

To answer the question click comment and post it underneath this question, do not make another post with your answer.

Define each term on the google document.