Drag each tile to the correct box. nina studies an artificial heart model. the model has tubes that supply an electric current to the model. nina switches on the current that provides an impulse to the heart. she observes that the heart contracts and relaxes. compare this model with that of a human heart, and place the steps describing how blood flows through the human heart in order. signal transferred to the ventricles the atria contract electrical signal travels toward the heart the ventricles contract signal by the nodes in the atrium signal received by the atrioventricular node

Be in this im starting a with you so if you want you can get a partner for this. but basically im going to assign you guys a biome and you have to have a big sheet paper and you will turn it into 4 squares. the top right square is will be a drawing square for a drawing you will make of your biome. the top left square is about the biomes plants and drawings of them. the bottom left square is about the biomes animals. the bottem rights square is about the description of the biome. leave a comment or an answer and i will assign biomes. if your request one thats the one you get. send me a link to the project and i will grade ! im not a teacher btw.

Im inn a ! what"s the answer which of the following is one way creativity can scientists? by ensuring they follow the scientific method by increasing the amount of time it takes to complete scientific experiments by making sure they only try things that have already been proven by leading them to ask more questions about the natural world

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these