The divos’ fur grew longer and thicker. The divos switched to eating seeds. The divos dug hole to live under the leaves or beneath rocks. The divos hibernated through the cold period until the habitat was warm again. The divos died. Habitat Change A small, short-furred, gray animal called a divo lives on an island. This island is the only place on Earth where divos live. The island habitat is warm and provides plenty of the divos’ only food, tree ants. The divos live high in the treetops, hidden from predators. One year the habitat experienced a drastic change that lasted for most of the year. It became very cold and even snowed. All of the ants died. The trees lost their leaves, but plenty of seeds and dried leaves were on the ground. Write down any of the things you think happened to most of the divos living on the island after their habitat changed. Explain your thinking. How did you decide what effect the change in habitat would have on most of the divos?
Carl: “I think the plants in the dark closet will be the tallest.” Monique: “I think the plants by the sunny window will be the tallest.” Jasmine: “I think the plants will be about the same height.” Drew: “I think the plants in the closet will stop growing and die.” Plants in the Dark and Light Four friends wondered how light affected the growth of plants. They decided to test their ideas using young bean plants. One set of plants was put in a dark closet for eight days. The other set of plants was put on a shelf near a sunny window for eight days. The friends then measured the height of the plants after eight days. This is what they predicted. Which friend do you agree with and why? Explain your thinking.
Anna: “ I think it is just something that happens over time.” Selma: “I think small organisms use it for energy and building material.” Logan: “I think wind and water soften it, and it dissolves into the soil.” Eli: “I think water and air rot it, then small animals come and eat the rest.” Jack: “I think it gets old and breaks apart into pieces too small to see.” Rotting Apples Four friends argued about why an apple on the ground eventually rots away and disappears. This is what they said: Which student do you most agree with? Provide and explanation for you answer.
sunlight water soil carbon dioxide oxygen minerals chlorophyll Giant Sequoia Tree The giant sequoia tree is one of the largest trees on earth. It starts as a small seedling and grows into an enormous tree. Where did most of the matter that makes up the wood and leaves of this huge tree originally come from? Choose the best answer. Explain your thinking. How did you decide where most of the matter that makes up this tree came from?
Photosynthesis (make their own food) Acquire and take in food from the environment Respiration (release energy from food) Response to stimuli Reproduction Functions of Living Things The functions listed below are performed by living organisms. Sort each example into a three-column chart labeled Plant, Animals, and Both. • Growth • Elimination of waste products • Storage of energy • Transport of materials within the organism • Cell division Explain your thinking. What helped you decide whether a function is performed by a plant, animal, or both?
tree rock fire boy wind rabbit cloud feather egg bacteria cell sun mushroom potato leaf pupae Is it Living? Listed below are examples of living (which includes once-living) and nonliving things. Make a two-column chart classifying the items below into living and nonliving. • hibernating bear • river • fossil • seed • grass • butterfly • molecule Explain your thinking. What “rule” or reasoning did you use to decide if something could be considered living?
water soil air sunlight darkness warmth Earth’s gravity fertilizer Needs of Seeds Seeds sprout and eventually grow into young plants called seedlings. Make a list of the things you think a seed needs in order for it to sprout. Explain your thinking. Describe the “rule” or reasoning you used to decide what a seed needs in order to sprout.